diff --git a/pkgs/applications/science/logic/acgtk/default.nix b/pkgs/applications/science/logic/acgtk/default.nix
index 0fd90ac13b6e..fa890c03b6f7 100644
--- a/pkgs/applications/science/logic/acgtk/default.nix
+++ b/pkgs/applications/science/logic/acgtk/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation {
     homepage = "http://www.loria.fr/equipes/calligramme/acg";
     description = "A toolkit for developing ACG signatures and lexicon";
     license = licenses.cecill20;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/build-support/ocaml/default.nix b/pkgs/build-support/ocaml/default.nix
index 87bfa6cea120..50f7627568d2 100644
--- a/pkgs/build-support/ocaml/default.nix
+++ b/pkgs/build-support/ocaml/default.nix
@@ -11,7 +11,7 @@
 let
   ocaml_version = (builtins.parseDrvName ocaml.name).version;
   defaultMeta = {
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 in
   assert minimumSupportedOcamlVersion != null ->
diff --git a/pkgs/development/compilers/mezzo/default.nix b/pkgs/development/compilers/mezzo/default.nix
index a0fe441b1538..67e7c932e555 100644
--- a/pkgs/development/compilers/mezzo/default.nix
+++ b/pkgs/development/compilers/mezzo/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
     homepage = http://protz.github.io/mezzo/;
     description = "A programming language in the ML tradition, which places strong emphasis on the control of aliasing and access to mutable memory";
     license = licenses.gpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
 
diff --git a/pkgs/development/interpreters/eff/default.nix b/pkgs/development/interpreters/eff/default.nix
index 4f2e100c684a..88490e9cd9c6 100644
--- a/pkgs/development/interpreters/eff/default.nix
+++ b/pkgs/development/interpreters/eff/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
       backtracking, multi-threading, and much more...
     '';
     license = licenses.bsd2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ansiterminal/default.nix b/pkgs/development/ocaml-modules/ansiterminal/default.nix
index 64b4f8263ff6..615e1d1b6739 100644
--- a/pkgs/development/ocaml-modules/ansiterminal/default.nix
+++ b/pkgs/development/ocaml-modules/ansiterminal/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
       this part is currently work in progress).
     '';
     license = licenses.lgpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/asn1-combinators/default.nix b/pkgs/development/ocaml-modules/asn1-combinators/default.nix
index b3555d7fddbb..544db9e0d78b 100644
--- a/pkgs/development/ocaml-modules/asn1-combinators/default.nix
+++ b/pkgs/development/ocaml-modules/asn1-combinators/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/mirleft/ocaml-asn1-combinators;
     description = "Combinators for expressing ASN.1 grammars in OCaml";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd2;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
     broken = stdenv.isi686; # https://github.com/mirleft/ocaml-asn1-combinators/issues/13
diff --git a/pkgs/development/ocaml-modules/base64/default.nix b/pkgs/development/ocaml-modules/base64/default.nix
index f7e4513d8265..aabb9f8a76a1 100644
--- a/pkgs/development/ocaml-modules/base64/default.nix
+++ b/pkgs/development/ocaml-modules/base64/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/mirage/ocaml-base64;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "Base64 encoding and decoding in OCaml";
     license = stdenv.lib.licenses.isc;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/batteries/default.nix b/pkgs/development/ocaml-modules/batteries/default.nix
index 06618fff819a..ae4dcc930765 100644
--- a/pkgs/development/ocaml-modules/batteries/default.nix
+++ b/pkgs/development/ocaml-modules/batteries/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
       language.
     '';
     license = stdenv.lib.licenses.lgpl21Plus;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/biniou/default.nix b/pkgs/development/ocaml-modules/biniou/default.nix
index 565176276f98..d2d3159cde14 100644
--- a/pkgs/development/ocaml-modules/biniou/default.nix
+++ b/pkgs/development/ocaml-modules/biniou/default.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
     homepage = "${webpage}";
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/bolt/default.nix b/pkgs/development/ocaml-modules/bolt/default.nix
index 61c3d6f23b40..cf8b21edb50e 100644
--- a/pkgs/development/ocaml-modules/bolt/default.nix
+++ b/pkgs/development/ocaml-modules/bolt/default.nix
@@ -48,7 +48,7 @@ EOF
       modeled after the famous log4j logging framework for Java.
     '';
     license = licenses.lgpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/calendar/default.nix b/pkgs/development/ocaml-modules/calendar/default.nix
index 48aaf9725037..c33deec9c784 100644
--- a/pkgs/development/ocaml-modules/calendar/default.nix
+++ b/pkgs/development/ocaml-modules/calendar/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
     homepage = https://forge.ocamlcore.org/projects/calendar/;
     description = "An Objective Caml library managing dates and times";
     license = "LGPL";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
     ];
diff --git a/pkgs/development/ocaml-modules/camlzip/default.nix b/pkgs/development/ocaml-modules/camlzip/default.nix
index 2024f5a5ab8f..de800a295bca 100644
--- a/pkgs/development/ocaml-modules/camlzip/default.nix
+++ b/pkgs/development/ocaml-modules/camlzip/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
       for reading from and writing to compressed files in these formats.
     '';
     license = "LGPL+linking exceptions";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/camomile/0.8.2.nix b/pkgs/development/ocaml-modules/camomile/0.8.2.nix
index f6d22f62ec09..9f7201708afd 100644
--- a/pkgs/development/ocaml-modules/camomile/0.8.2.nix
+++ b/pkgs/development/ocaml-modules/camomile/0.8.2.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
     description = "A comprehensive Unicode library for OCaml";
     license = stdenv.lib.licenses.lgpl21;
     branch = "0.8.2";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/camomile/default.nix b/pkgs/development/ocaml-modules/camomile/default.nix
index ecdc5bef2958..11a7828f1e41 100644
--- a/pkgs/development/ocaml-modules/camomile/default.nix
+++ b/pkgs/development/ocaml-modules/camomile/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
     homepage = https://github.com/yoriyuki/Camomile/tree/master/Camomile;
     description = "A comprehensive Unicode library for OCaml";
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/cil/default.nix b/pkgs/development/ocaml-modules/cil/default.nix
index 43522e180b63..1753084910b9 100644
--- a/pkgs/development/ocaml-modules/cil/default.nix
+++ b/pkgs/development/ocaml-modules/cil/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation {
     description = "A front-end for the C programming language that facilitates program analysis and transformation";
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/cmdliner/default.nix b/pkgs/development/ocaml-modules/cmdliner/default.nix
index ba955061740a..80992bdfe7c7 100644
--- a/pkgs/development/ocaml-modules/cmdliner/default.nix
+++ b/pkgs/development/ocaml-modules/cmdliner/default.nix
@@ -35,6 +35,6 @@ stdenv.mkDerivation {
     description = "An OCaml module for the declarative definition of command line interfaces";
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/config-file/default.nix b/pkgs/development/ocaml-modules/config-file/default.nix
index 15eb06667778..4ca9d4a30e0d 100644
--- a/pkgs/development/ocaml-modules/config-file/default.nix
+++ b/pkgs/development/ocaml-modules/config-file/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = http://config-file.forge.ocamlcore.org/;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "An OCaml library used to manage the configuration file(s) of an application";
     license = stdenv.lib.licenses.lgpl2Plus;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/containers/default.nix b/pkgs/development/ocaml-modules/containers/default.nix
index 5c2447614ada..8a03098d84b9 100644
--- a/pkgs/development/ocaml-modules/containers/default.nix
+++ b/pkgs/development/ocaml-modules/containers/default.nix
@@ -42,6 +42,6 @@ stdenv.mkDerivation {
       helpers for unix and threads.
     '';
     license = stdenv.lib.licenses.bsd2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/cpdf/default.nix b/pkgs/development/ocaml-modules/cpdf/default.nix
index 20f03667c3be..d29136dd434e 100644
--- a/pkgs/development/ocaml-modules/cpdf/default.nix
+++ b/pkgs/development/ocaml-modules/cpdf/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = http://www.coherentpdf.com/;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "PDF Command Line Tools";
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/cryptgps/default.nix b/pkgs/development/ocaml-modules/cryptgps/default.nix
index 8f18658b0f65..114aa7e5ffd3 100644
--- a/pkgs/development/ocaml-modules/cryptgps/default.nix
+++ b/pkgs/development/ocaml-modules/cryptgps/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
       itself.
     '';
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/cryptokit/default.nix b/pkgs/development/ocaml-modules/cryptokit/default.nix
index cfb353bfe3e5..f56ec3cbed62 100644
--- a/pkgs/development/ocaml-modules/cryptokit/default.nix
+++ b/pkgs/development/ocaml-modules/cryptokit/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = "http://pauillac.inria.fr/~xleroy/software.html";
     description = "A library of cryptographic primitives for OCaml";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/cstruct/default.nix b/pkgs/development/ocaml-modules/cstruct/default.nix
index 5b2eebed9e0d..57a057e0eaa9 100644
--- a/pkgs/development/ocaml-modules/cstruct/default.nix
+++ b/pkgs/development/ocaml-modules/cstruct/default.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation {
     description = "Map OCaml arrays onto C-like structs";
     license = stdenv.lib.licenses.isc;
     maintainers = [ maintainers.vbgl maintainers.ericbmerritt ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/csv/default.nix b/pkgs/development/ocaml-modules/csv/default.nix
index e04523cd14cc..760b981dd2ca 100644
--- a/pkgs/development/ocaml-modules/csv/default.nix
+++ b/pkgs/development/ocaml-modules/csv/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation {
     homepage = https://github.com/Chris00/ocaml-csv;
     license = licenses.lgpl21;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/dolog/default.nix b/pkgs/development/ocaml-modules/dolog/default.nix
index 898c2b67fd69..5987c53898fc 100644
--- a/pkgs/development/ocaml-modules/dolog/default.nix
+++ b/pkgs/development/ocaml-modules/dolog/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/UnixJunkie/dolog;
     description = "Minimalistic lazy logger in OCaml";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/dypgen/default.nix b/pkgs/development/ocaml-modules/dypgen/default.nix
index 63a48219b15e..b579c073f29f 100644
--- a/pkgs/development/ocaml-modules/dypgen/default.nix
+++ b/pkgs/development/ocaml-modules/dypgen/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation {
     homepage = http://dypgen.free.fr;
     description = "Dypgen GLR self extensible parser generator";
     license = stdenv.lib.licenses.cecill-b;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/eliom/default.nix b/pkgs/development/ocaml-modules/eliom/default.nix
index ef0a88fb2280..80b5b9eae0e6 100644
--- a/pkgs/development/ocaml-modules/eliom/default.nix
+++ b/pkgs/development/ocaml-modules/eliom/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec
 
     license = stdenv.lib.licenses.lgpl21;
 
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
 
     maintainers = [ stdenv.lib.maintainers.gal_bolle ];
   };
diff --git a/pkgs/development/ocaml-modules/enumerate/default.nix b/pkgs/development/ocaml-modules/enumerate/default.nix
index ce20cdd47bb4..a9475649ff66 100644
--- a/pkgs/development/ocaml-modules/enumerate/default.nix
+++ b/pkgs/development/ocaml-modules/enumerate/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation {
     homepage = https://ocaml.janestreet.com/;
     description = "Quotation expanders for enumerating finite types";
     license = stdenv.lib.licenses.asl20;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/erm_xml/default.nix b/pkgs/development/ocaml-modules/erm_xml/default.nix
index 0ff2a725ea2b..ecfdb846ff1e 100644
--- a/pkgs/development/ocaml-modules/erm_xml/default.nix
+++ b/pkgs/development/ocaml-modules/erm_xml/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/ermine/xml;
     description = "XML Parser for discrete data";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/erm_xmpp/default.nix b/pkgs/development/ocaml-modules/erm_xmpp/default.nix
index 7508a14738dc..efa239f6c332 100644
--- a/pkgs/development/ocaml-modules/erm_xmpp/default.nix
+++ b/pkgs/development/ocaml-modules/erm_xmpp/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/ermine/xmpp;
     description = "OCaml based XMPP implementation";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/extlib/default.nix b/pkgs/development/ocaml-modules/extlib/default.nix
index 9f5f8119fb6d..492b10bb09b3 100644
--- a/pkgs/development/ocaml-modules/extlib/default.nix
+++ b/pkgs/development/ocaml-modules/extlib/default.nix
@@ -23,6 +23,6 @@ stdenv.mkDerivation {
     homepage = http://code.google.com/p/ocaml-extlib/;
     description = "Enhancements to the OCaml Standard Library modules";
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ezjsonm/default.nix b/pkgs/development/ocaml-modules/ezjsonm/default.nix
index 25a9e4128bf0..fd8ce1c33898 100644
--- a/pkgs/development/ocaml-modules/ezjsonm/default.nix
+++ b/pkgs/development/ocaml-modules/ezjsonm/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation {
     homepage = https://github.com/mirage/ezjsonm;
     license = stdenv.lib.licenses.isc;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/fieldslib/default.nix b/pkgs/development/ocaml-modules/fieldslib/default.nix
index 385487903290..bbefcc0f3cc0 100644
--- a/pkgs/development/ocaml-modules/fieldslib/default.nix
+++ b/pkgs/development/ocaml-modules/fieldslib/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation {
     description = "OCaml syntax extension to define first class values representing record fields, to get and set record fields, iterate and fold over all fields of a record and create new record values";
     license = licenses.asl20;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/fileutils/default.nix b/pkgs/development/ocaml-modules/fileutils/default.nix
index 7a8a80a446c3..3ffcfada3d5d 100644
--- a/pkgs/development/ocaml-modules/fileutils/default.nix
+++ b/pkgs/development/ocaml-modules/fileutils/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://forge.ocamlcore.org/projects/ocaml-fileutils/;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "Library to provide pure OCaml functions to manipulate real file (POSIX like) and filename";
     license = stdenv.lib.licenses.lgpl21Plus;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/fix/default.nix b/pkgs/development/ocaml-modules/fix/default.nix
index b0429e0e9103..77e2461bda04 100644
--- a/pkgs/development/ocaml-modules/fix/default.nix
+++ b/pkgs/development/ocaml-modules/fix/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation {
     description = "A simple OCaml module for computing the least solution of a system of monotone equations";
     license = licenses.cecill-c;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/fontconfig/default.nix b/pkgs/development/ocaml-modules/fontconfig/default.nix
index 65311683d0c0..635572ea9c8f 100644
--- a/pkgs/development/ocaml-modules/fontconfig/default.nix
+++ b/pkgs/development/ocaml-modules/fontconfig/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Fontconfig bindings for OCaml";
     license = stdenv.lib.licenses.gpl2Plus;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/functory/default.nix b/pkgs/development/ocaml-modules/functory/default.nix
index 35dd542af9e3..6d4deac38c47 100644
--- a/pkgs/development/ocaml-modules/functory/default.nix
+++ b/pkgs/development/ocaml-modules/functory/default.nix
@@ -22,6 +22,6 @@ stdenv.mkDerivation {
     description = "A distributed computing library for Objective Caml which facilitates distributed execution of parallelizable computations in a seamless fashion";
     license = licenses.lgpl21;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/gapi-ocaml/default.nix b/pkgs/development/ocaml-modules/gapi-ocaml/default.nix
index 51afb39ca659..ac85a03cc985 100644
--- a/pkgs/development/ocaml-modules/gapi-ocaml/default.nix
+++ b/pkgs/development/ocaml-modules/gapi-ocaml/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
     homepage = http://gapi-ocaml.forge.ocamlcore.org;
     license = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ bennofs ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/gen/default.nix b/pkgs/development/ocaml-modules/gen/default.nix
index 0b8f4253e76c..90f74b2c6026 100644
--- a/pkgs/development/ocaml-modules/gen/default.nix
+++ b/pkgs/development/ocaml-modules/gen/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation {
     homepage = https://github.com/c-cube/gen;
     description = "Simple, efficient iterators for OCaml";
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/gg/default.nix b/pkgs/development/ocaml-modules/gg/default.nix
index 653b627fc0b6..9351bfa7520e 100644
--- a/pkgs/development/ocaml-modules/gg/default.nix
+++ b/pkgs/development/ocaml-modules/gg/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       raster data.
     '';
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.jirkamarsik ];
   };
diff --git a/pkgs/development/ocaml-modules/gtktop/default.nix b/pkgs/development/ocaml-modules/gtktop/default.nix
index ca0687882879..de0334c2a183 100644
--- a/pkgs/development/ocaml-modules/gtktop/default.nix
+++ b/pkgs/development/ocaml-modules/gtktop/default.nix
@@ -20,6 +20,6 @@ stdenv.mkDerivation {
     description = "A small OCaml library to ease the creation of graphical toplevels";
     license = stdenv.lib.licenses.lgpl3;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/hex/default.nix b/pkgs/development/ocaml-modules/hex/default.nix
index a9d30f1a9e7e..07b7773ff2c7 100644
--- a/pkgs/development/ocaml-modules/hex/default.nix
+++ b/pkgs/development/ocaml-modules/hex/default.nix
@@ -22,6 +22,6 @@ stdenv.mkDerivation {
     homepage = https://github.com/mirage/ocaml-hex;
     license = stdenv.lib.licenses.isc;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/http/default.nix b/pkgs/development/ocaml-modules/http/default.nix
index 932a5811bec7..d2fa675bbd82 100644
--- a/pkgs/development/ocaml-modules/http/default.nix
+++ b/pkgs/development/ocaml-modules/http/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     homepage = http://ocaml-http.forge.ocamlcore.org/;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "do it yourself (OCaml) HTTP daemon";
     license = licenses.lgpl2;
     maintainers = with maintainers; [ roconnor vbgl ];
diff --git a/pkgs/development/ocaml-modules/io-page/default.nix b/pkgs/development/ocaml-modules/io-page/default.nix
index c883175f6e0f..8580bb647134 100644
--- a/pkgs/development/ocaml-modules/io-page/default.nix
+++ b/pkgs/development/ocaml-modules/io-page/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/mirage/io-page;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "IO memory page library for Mirage backends";
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/iso8601/default.nix b/pkgs/development/ocaml-modules/iso8601/default.nix
index 4b194332d086..0aad6f7b13bb 100644
--- a/pkgs/development/ocaml-modules/iso8601/default.nix
+++ b/pkgs/development/ocaml-modules/iso8601/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
     homepage = http://sagotch.github.io/ISO8601.ml/;
     description = "ISO 8601 and RFC 3999 date parsing for OCaml";
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/javalib/default.nix b/pkgs/development/ocaml-modules/javalib/default.nix
index 7272e668aa20..894c93eba4db 100644
--- a/pkgs/development/ocaml-modules/javalib/default.nix
+++ b/pkgs/development/ocaml-modules/javalib/default.nix
@@ -38,6 +38,6 @@ stdenv.mkDerivation rec {
     homepage = "${webpage}";
     license = licenses.lgpl3;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/jsonm/default.nix b/pkgs/development/ocaml-modules/jsonm/default.nix
index e81c94d8b24b..cc5de781beec 100644
--- a/pkgs/development/ocaml-modules/jsonm/default.nix
+++ b/pkgs/development/ocaml-modules/jsonm/default.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation {
     homepage = http://erratique.ch/software/jsonm;
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/lablgtk-extras/1.4.nix b/pkgs/development/ocaml-modules/lablgtk-extras/1.4.nix
index fbe9898fd81e..dae81f1df166 100644
--- a/pkgs/development/ocaml-modules/lablgtk-extras/1.4.nix
+++ b/pkgs/development/ocaml-modules/lablgtk-extras/1.4.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   createFindlibDestdir = true;
 
   meta = {
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
     homepage = http://gtk-extras.forge.ocamlcore.org/;
     description = "A collection of libraries and modules useful when developing OCaml/LablGtk2 applications";
diff --git a/pkgs/development/ocaml-modules/lablgtk-extras/default.nix b/pkgs/development/ocaml-modules/lablgtk-extras/default.nix
index 80e5a72abf52..68019113f388 100644
--- a/pkgs/development/ocaml-modules/lablgtk-extras/default.nix
+++ b/pkgs/development/ocaml-modules/lablgtk-extras/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
   createFindlibDestdir = true;
 
   meta = {
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
     homepage = http://gtk-extras.forge.ocamlcore.org/;
     description = "A collection of libraries and modules useful when developing OCaml/LablGtk2 applications";
diff --git a/pkgs/development/ocaml-modules/lablgtk/2.14.0.nix b/pkgs/development/ocaml-modules/lablgtk/2.14.0.nix
index 1815bfc64ddd..bc4b490e8533 100644
--- a/pkgs/development/ocaml-modules/lablgtk/2.14.0.nix
+++ b/pkgs/development/ocaml-modules/lablgtk/2.14.0.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (rec {
 
   meta = {
     branch = "2.14";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
       stdenv.lib.maintainers.roconnor
diff --git a/pkgs/development/ocaml-modules/lablgtk/default.nix b/pkgs/development/ocaml-modules/lablgtk/default.nix
index 4c1665540ec2..a4d4314cd021 100644
--- a/pkgs/development/ocaml-modules/lablgtk/default.nix
+++ b/pkgs/development/ocaml-modules/lablgtk/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       z77z roconnor vbgl
     ];
diff --git a/pkgs/development/ocaml-modules/lambda-term/1.6.nix b/pkgs/development/ocaml-modules/lambda-term/1.6.nix
index 9f4b17f9b610..026f67d8ef44 100644
--- a/pkgs/development/ocaml-modules/lambda-term/1.6.nix
+++ b/pkgs/development/ocaml-modules/lambda-term/1.6.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
     homepage = https://github.com/diml/lambda-term;
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     branch = "1.6";
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
diff --git a/pkgs/development/ocaml-modules/lambda-term/default.nix b/pkgs/development/ocaml-modules/lambda-term/default.nix
index 0186ab055f5e..ec9232645e76 100644
--- a/pkgs/development/ocaml-modules/lambda-term/default.nix
+++ b/pkgs/development/ocaml-modules/lambda-term/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
     homepage = https://github.com/diml/lambda-term;
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
     ];
diff --git a/pkgs/development/ocaml-modules/llvm/default.nix b/pkgs/development/ocaml-modules/llvm/default.nix
index 57cf9fe4678b..2f58c41ba355 100644
--- a/pkgs/development/ocaml-modules/llvm/default.nix
+++ b/pkgs/development/ocaml-modules/llvm/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
 
   meta = {
     inherit (llvm.meta) license homepage;
-    inherit (ocaml.meta) platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "OCaml bindings distributed with LLVM";
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/lwt/default.nix b/pkgs/development/ocaml-modules/lwt/default.nix
index a018194a2ace..e8cdc180b729 100644
--- a/pkgs/development/ocaml-modules/lwt/default.nix
+++ b/pkgs/development/ocaml-modules/lwt/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
     homepage = http://ocsigen.org/lwt;
     description = "Lightweight thread library for Objective Caml";
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       z77z vbgl gal_bolle
     ];
diff --git a/pkgs/development/ocaml-modules/macaque/default.nix b/pkgs/development/ocaml-modules/macaque/default.nix
index 99c2a292fe8d..a24859892fa1 100644
--- a/pkgs/development/ocaml-modules/macaque/default.nix
+++ b/pkgs/development/ocaml-modules/macaque/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
     description = "Macros for Caml Queries";
     homepage = https://github.com/ocsigen/macaque;
     license = licenses.lgpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/magic-mime/default.nix b/pkgs/development/ocaml-modules/magic-mime/default.nix
index d77c3f681158..9c42aed37df2 100644
--- a/pkgs/development/ocaml-modules/magic-mime/default.nix
+++ b/pkgs/development/ocaml-modules/magic-mime/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/mirage/ocaml-magic-mime;
     description = "Convert file extensions to MIME types";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.isc;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/menhir/generic.nix b/pkgs/development/ocaml-modules/menhir/generic.nix
index 8758ff3cffbc..088c2db061be 100644
--- a/pkgs/development/ocaml-modules/menhir/generic.nix
+++ b/pkgs/development/ocaml-modules/menhir/generic.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
       qpl /* generator */
       lgpl2 /* library */
     ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ z77z ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/nocrypto/default.nix b/pkgs/development/ocaml-modules/nocrypto/default.nix
index a5d73839cb2e..ed13a56955b6 100644
--- a/pkgs/development/ocaml-modules/nocrypto/default.nix
+++ b/pkgs/development/ocaml-modules/nocrypto/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/mirleft/ocaml-nocrypto;
     description = "Simplest possible crypto to support TLS";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd2;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
index f77bd3acc627..f4076fbd95fe 100644
--- a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
@@ -40,6 +40,6 @@ stdenv.mkDerivation {
     homepage = http://cairographics.org/cairo-ocaml;
     description = "ocaml bindings for cairo library";
     license = stdenv.lib.licenses.gpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocaml-cairo2/default.nix b/pkgs/development/ocaml-modules/ocaml-cairo2/default.nix
index 97178ac701f8..6b9f6f09ea32 100644
--- a/pkgs/development/ocaml-modules/ocaml-cairo2/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-cairo2/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation {
       and SVG file output.
     '';
     license = licenses.lgpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocaml-result/default.nix b/pkgs/development/ocaml-modules/ocaml-result/default.nix
index 8b6e0966f7e2..f531de5118ea 100644
--- a/pkgs/development/ocaml-modules/ocaml-result/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-result/default.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation {
       Result module defined in this library.
     '';
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocaml-text/default.nix b/pkgs/development/ocaml-modules/ocaml-text/default.nix
index 8bbf08e3c74a..9c84045de60d 100644
--- a/pkgs/development/ocaml-modules/ocaml-text/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-text/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation {
     homepage = "http://ocaml-text.forge.ocamlcore.org/";
     description = "A library for convenient text manipulation";
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocamlgraph/default.nix b/pkgs/development/ocaml-modules/ocamlgraph/default.nix
index c7427558314e..bbef4e010159 100644
--- a/pkgs/development/ocaml-modules/ocamlgraph/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlgraph/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
     homepage = http://ocamlgraph.lri.fr/;
     description = "Graph library for Objective Caml";
     license = stdenv.lib.licenses.gpl2Oss;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.kkallio
     ];
diff --git a/pkgs/development/ocaml-modules/ocamlnat/default.nix b/pkgs/development/ocaml-modules/ocamlnat/default.nix
index dc5d191f75af..1aeb43b8cf44 100644
--- a/pkgs/development/ocaml-modules/ocamlnat/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlnat/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
       x86 or x86-64 processors. Support for additional architectures and
       operating systems is planned, but not yet available.
     '';
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/ocamlnet/default.nix b/pkgs/development/ocaml-modules/ocamlnet/default.nix
index 0948b7132a4e..8ef940e75b00 100644
--- a/pkgs/development/ocaml-modules/ocamlnet/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlnet/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
     homepage = http://projects.camlcity.org/projects/ocamlnet.html;
     description = "A library implementing Internet protocols (http, cgi, email, etc.) for OCaml";
     license = "Most Ocamlnet modules are released under the zlib/png license. The HTTP server module Nethttpd is, however, under the GPL.";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/ocplib-endian/default.nix b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
index aede92fc0f0e..351f667a8c90 100644
--- a/pkgs/development/ocaml-modules/ocplib-endian/default.nix
+++ b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
     description = "Optimised functions to read and write int16/32/64";
     homepage = https://github.com/OCamlPro/ocplib-endian;
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocsigen-deriving/default.nix b/pkgs/development/ocaml-modules/ocsigen-deriving/default.nix
index 89efb58ecbb5..d2d66994604b 100644
--- a/pkgs/development/ocaml-modules/ocsigen-deriving/default.nix
+++ b/pkgs/development/ocaml-modules/ocsigen-deriving/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
     homepage = https://github.com/ocsigen/deriving;
     description = "Extension to OCaml for deriving functions from type declarations";
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [
       gal_bolle vbgl
     ];
diff --git a/pkgs/development/ocaml-modules/ocsigen-server/default.nix b/pkgs/development/ocaml-modules/ocsigen-server/default.nix
index a1bd7d162342..d2613830a7c2 100644
--- a/pkgs/development/ocaml-modules/ocsigen-server/default.nix
+++ b/pkgs/development/ocaml-modules/ocsigen-server/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
       A full featured Web server. It implements most features of the HTTP protocol, and has a very powerful extension mechanism that make very easy to plug your own OCaml modules for generating pages.
       '';
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ stdenv.lib.maintainers.gal_bolle ];
   };
 
diff --git a/pkgs/development/ocaml-modules/ocurl/default.nix b/pkgs/development/ocaml-modules/ocurl/default.nix
index 2cfb6af68a8b..d711bae0f34b 100644
--- a/pkgs/development/ocaml-modules/ocurl/default.nix
+++ b/pkgs/development/ocaml-modules/ocurl/default.nix
@@ -14,6 +14,6 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.bsd3;
     homepage = http://ocurl.forge.ocamlcore.org/;
     maintainers = with stdenv.lib.maintainers; [ bennofs ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/odn/default.nix b/pkgs/development/ocaml-modules/odn/default.nix
index eaeb7e7b22f7..b3c7ddb84331 100644
--- a/pkgs/development/ocaml-modules/odn/default.nix
+++ b/pkgs/development/ocaml-modules/odn/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
     description = "Store data using OCaml notation";
     homepage = https://forge.ocamlcore.org/projects/odn/;
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       vbgl z77z
     ];
diff --git a/pkgs/development/ocaml-modules/ojquery/default.nix b/pkgs/development/ocaml-modules/ojquery/default.nix
index c048f62e89ca..054303ac8500 100644
--- a/pkgs/development/ocaml-modules/ojquery/default.nix
+++ b/pkgs/development/ocaml-modules/ojquery/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     description = "jQuery Binding for Eliom";
     homepage = http://ocsigen.org/ojquery/;
     license = stdenv.lib.licenses.lgpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/optcomp/default.nix b/pkgs/development/ocaml-modules/optcomp/default.nix
index b134a842c5c0..120751454151 100644
--- a/pkgs/development/ocaml-modules/optcomp/default.nix
+++ b/pkgs/development/ocaml-modules/optcomp/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
     homepage = https://github.com/diml/optcomp;
     description = "Optional compilation for OCaml with cpp-like directives";
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
     ];
diff --git a/pkgs/development/ocaml-modules/otfm/default.nix b/pkgs/development/ocaml-modules/otfm/default.nix
index 5a118c0bcd89..a2047a0fe786 100644
--- a/pkgs/development/ocaml-modules/otfm/default.nix
+++ b/pkgs/development/ocaml-modules/otfm/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
       of them.
     '';
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.jirkamarsik ];
   };
diff --git a/pkgs/development/ocaml-modules/ounit/default.nix b/pkgs/development/ocaml-modules/ounit/default.nix
index ba0ce29bdf9d..d449296ab701 100644
--- a/pkgs/development/ocaml-modules/ounit/default.nix
+++ b/pkgs/development/ocaml-modules/ounit/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
     homepage = http://ounit.forge.ocamlcore.org/;
     description = "Unit test framework for OCaml";
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/pcre/default.nix b/pkgs/development/ocaml-modules/pcre/default.nix
index 7f7caf8e5a87..dd152262ca79 100644
--- a/pkgs/development/ocaml-modules/pcre/default.nix
+++ b/pkgs/development/ocaml-modules/pcre/default.nix
@@ -22,7 +22,7 @@ buildOcaml {
     homepage = "https://bitbucket.org/mmottl/pcre-ocaml";
     description = "An efficient C-library for pattern matching with Perl-style regular expressions in OCaml";
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ z77z vbmithr ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/pgocaml/default.nix b/pkgs/development/ocaml-modules/pgocaml/default.nix
index 00c0d472f9a8..f1bc4849a7f5 100644
--- a/pkgs/development/ocaml-modules/pgocaml/default.nix
+++ b/pkgs/development/ocaml-modules/pgocaml/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
     description = "An interface to PostgreSQL databases for OCaml applications";
     homepage = http://pgocaml.forge.ocamlcore.org/;
     license = licenses.lgpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/pprint/default.nix b/pkgs/development/ocaml-modules/pprint/default.nix
index 18cc4817b130..e28f85b475cc 100644
--- a/pkgs/development/ocaml-modules/pprint/default.nix
+++ b/pkgs/development/ocaml-modules/pprint/default.nix
@@ -23,6 +23,6 @@ stdenv.mkDerivation {
     description = "An OCaml adaptation of Wadler’s and Leijen’s prettier printer";
     license = licenses.cecill-c;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ppx_tools/default.nix b/pkgs/development/ocaml-modules/ppx_tools/default.nix
index 4e99dcd1af45..1fea9bbd1911 100644
--- a/pkgs/development/ocaml-modules/ppx_tools/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_tools/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
     description = "Tools for authors of ppx rewriters";
     homepage = http://www.lexifi.com/ppx_tools;
     license = licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/pycaml/default.nix b/pkgs/development/ocaml-modules/pycaml/default.nix
index 070bd270b11a..403c39a465d8 100644
--- a/pkgs/development/ocaml-modules/pycaml/default.nix
+++ b/pkgs/development/ocaml-modules/pycaml/default.nix
@@ -46,6 +46,6 @@ in stdenv.mkDerivation {
     homepage = "http://github.com/chemoelectric/pycaml";
     description = "Bindings for python and ocaml";
     license = "LGPL";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/qcheck/default.nix b/pkgs/development/ocaml-modules/qcheck/default.nix
index 260a1fc9811a..7d904e576336 100644
--- a/pkgs/development/ocaml-modules/qcheck/default.nix
+++ b/pkgs/development/ocaml-modules/qcheck/default.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation {
     homepage = https://github.com/c-cube/qcheck/;
     license = stdenv.lib.licenses.bsd2;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/qtest/default.nix b/pkgs/development/ocaml-modules/qtest/default.nix
index e68a8729c014..f7e585b43b08 100644
--- a/pkgs/development/ocaml-modules/qtest/default.nix
+++ b/pkgs/development/ocaml-modules/qtest/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Inline (Unit) Tests for OCaml (formerly “qtest”)";
     homepage = https://github.com/vincent-hugot/iTeML;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/re/default.nix b/pkgs/development/ocaml-modules/re/default.nix
index 5e7ae1cba091..6b7ba1a13b23 100644
--- a/pkgs/development/ocaml-modules/re/default.nix
+++ b/pkgs/development/ocaml-modules/re/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://github.com/ocaml/ocaml-re;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "Pure OCaml regular expressions, with support for Perl and POSIX-style strings";
     license = stdenv.lib.licenses.lgpl2;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/react/default.nix b/pkgs/development/ocaml-modules/react/default.nix
index dfc8dcd1439c..943e5e1e8dc9 100644
--- a/pkgs/development/ocaml-modules/react/default.nix
+++ b/pkgs/development/ocaml-modules/react/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
     homepage = http://erratique.ch/software/react;
     description = "Applicative events and signals for OCaml";
     license = licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ z77z vbmithr gal_bolle];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reactivedata/default.nix b/pkgs/development/ocaml-modules/reactivedata/default.nix
index eecae885302f..ef0197f60f57 100644
--- a/pkgs/development/ocaml-modules/reactivedata/default.nix
+++ b/pkgs/development/ocaml-modules/reactivedata/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
     description = "An OCaml module for functional reactive programming (FRP) based on React";
     homepage = https://github.com/hhugo/reactiveData;
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/safepass/default.nix b/pkgs/development/ocaml-modules/safepass/default.nix
index 7fc5dadda74e..2f941b923e33 100644
--- a/pkgs/development/ocaml-modules/safepass/default.nix
+++ b/pkgs/development/ocaml-modules/safepass/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
     homepage = http://ocaml-safepass.forge.ocamlcore.org/;
     description = "An OCaml library offering facilities for the safe storage of user passwords";
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/sawja/default.nix b/pkgs/development/ocaml-modules/sawja/default.nix
index 534a7684cec4..cfc74ad16683 100644
--- a/pkgs/development/ocaml-modules/sawja/default.nix
+++ b/pkgs/development/ocaml-modules/sawja/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     homepage = "${webpage}";
     license = licenses.gpl3Plus;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/sequence/default.nix b/pkgs/development/ocaml-modules/sequence/default.nix
index d9c49ece60d7..c689aec1904f 100644
--- a/pkgs/development/ocaml-modules/sequence/default.nix
+++ b/pkgs/development/ocaml-modules/sequence/default.nix
@@ -33,6 +33,6 @@ stdenv.mkDerivation {
       sequence is iterated/folded on.
     '';
     license = stdenv.lib.licenses.bsd2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/sexplib/108.08.00.nix b/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
index dd9e89bcef70..40b95e09e8b7 100644
--- a/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
+++ b/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation {
     description = "Library for serializing OCaml values to and from S-expressions";
     license = licenses.asl20;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/sexplib/111.25.00.nix b/pkgs/development/ocaml-modules/sexplib/111.25.00.nix
index 61d46e205fa6..55b09c3fdc3a 100644
--- a/pkgs/development/ocaml-modules/sexplib/111.25.00.nix
+++ b/pkgs/development/ocaml-modules/sexplib/111.25.00.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation {
     description = "Library for serializing OCaml values to and from S-expressions";
     license = licenses.asl20;
     maintainers = [ maintainers.vbgl maintainers.ericbmerritt ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/sqlite3/default.nix b/pkgs/development/ocaml-modules/sqlite3/default.nix
index 53549791b253..804e33fc7386 100644
--- a/pkgs/development/ocaml-modules/sqlite3/default.nix
+++ b/pkgs/development/ocaml-modules/sqlite3/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     homepage = http://mmottl.github.io/sqlite3-ocaml/;
     description = "OCaml bindings to the SQLite 3 database access library";
     license = licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       z77z vbgl
     ];
diff --git a/pkgs/development/ocaml-modules/sqlite3EZ/default.nix b/pkgs/development/ocaml-modules/sqlite3EZ/default.nix
index 94377a646c1c..a6ff9f44116c 100644
--- a/pkgs/development/ocaml-modules/sqlite3EZ/default.nix
+++ b/pkgs/development/ocaml-modules/sqlite3EZ/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation {
     description = "A thin wrapper for sqlite3-ocaml with a simplified interface";
     license = licenses.mit;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/ssl/default.nix b/pkgs/development/ocaml-modules/ssl/default.nix
index 6e3ded0b0f27..6eb43d07b686 100644
--- a/pkgs/development/ocaml-modules/ssl/default.nix
+++ b/pkgs/development/ocaml-modules/ssl/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
     homepage = http://savonet.rastageeks.org/;
     description = "OCaml bindings for libssl ";
     license = "LGPL+link exception";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/ocaml-modules/stringext/default.nix b/pkgs/development/ocaml-modules/stringext/default.nix
index 961ee4b1fcd5..05aa2c2da683 100644
--- a/pkgs/development/ocaml-modules/stringext/default.nix
+++ b/pkgs/development/ocaml-modules/stringext/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/rgrinberg/stringext;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "Extra string functions for OCaml";
     license = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/tsdl/default.nix b/pkgs/development/ocaml-modules/tsdl/default.nix
index 85ea80aeafef..79a696632e1b 100644
--- a/pkgs/development/ocaml-modules/tsdl/default.nix
+++ b/pkgs/development/ocaml-modules/tsdl/default.nix
@@ -44,6 +44,6 @@ stdenv.mkDerivation {
     homepage = "${webpage}";
     description = "Thin bindings to the cross-platform SDL library";
     license = licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/twt/default.nix b/pkgs/development/ocaml-modules/twt/default.nix
index 4ddbc6705a57..e5831be93bda 100644
--- a/pkgs/development/ocaml-modules/twt/default.nix
+++ b/pkgs/development/ocaml-modules/twt/default.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation {
     description = "“The Whitespace Thing” for OCaml";
     license = licenses.mit;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/type_conv/108.08.00.nix b/pkgs/development/ocaml-modules/type_conv/108.08.00.nix
index d3e32105f7df..e014da8b66a9 100644
--- a/pkgs/development/ocaml-modules/type_conv/108.08.00.nix
+++ b/pkgs/development/ocaml-modules/type_conv/108.08.00.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
     description = "Support library for OCaml preprocessor type conversions";
     license = licenses.asl20;
     branch = "108";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ z77z ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/type_conv/109.60.01.nix b/pkgs/development/ocaml-modules/type_conv/109.60.01.nix
index fe42dd5ddcbd..b6747a48d95d 100644
--- a/pkgs/development/ocaml-modules/type_conv/109.60.01.nix
+++ b/pkgs/development/ocaml-modules/type_conv/109.60.01.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
     homepage = "http://forge.ocamlcore.org/projects/type-conv/";
     description = "Support library for OCaml preprocessor type conversions";
     license = stdenv.lib.licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ z77z ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/tyxml/default.nix b/pkgs/development/ocaml-modules/tyxml/default.nix
index d3a0b3557c52..64c1de13fb35 100644
--- a/pkgs/development/ocaml-modules/tyxml/default.nix
+++ b/pkgs/development/ocaml-modules/tyxml/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
     homepage = http://ocsigen.org/tyxml/;
     description = "A library that makes it almost impossible for your OCaml programs to generate wrong XML output, using static typing";
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       gal_bolle vbgl
       ];
diff --git a/pkgs/development/ocaml-modules/ulex/default.nix b/pkgs/development/ocaml-modules/ulex/default.nix
index 61c52278621f..1e0632387e31 100644
--- a/pkgs/development/ocaml-modules/ulex/default.nix
+++ b/pkgs/development/ocaml-modules/ulex/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
     homepage = http://www.cduce.org/download.html;
     description = "A lexer generator for Unicode and OCaml";
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ stdenv.lib.maintainers.roconnor ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/uri/default.nix b/pkgs/development/ocaml-modules/uri/default.nix
index 03620d05f54d..dca989c88efd 100644
--- a/pkgs/development/ocaml-modules/uri/default.nix
+++ b/pkgs/development/ocaml-modules/uri/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/mirage/ocaml-uri;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "RFC3986 URI parsing library for OCaml";
     license = stdenv.lib.licenses.isc;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/development/ocaml-modules/uucd/default.nix b/pkgs/development/ocaml-modules/uucd/default.nix
index 476f0e9bbe8c..8e497560c68e 100644
--- a/pkgs/development/ocaml-modules/uucd/default.nix
+++ b/pkgs/development/ocaml-modules/uucd/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "An OCaml module to decode the data of the Unicode character database from its XML representation";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.vbgl ];
     license = licenses.bsd3;
   };
diff --git a/pkgs/development/ocaml-modules/uucp/default.nix b/pkgs/development/ocaml-modules/uucp/default.nix
index 67df949ac8bf..4e4dd67e2105 100644
--- a/pkgs/development/ocaml-modules/uucp/default.nix
+++ b/pkgs/development/ocaml-modules/uucp/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     description = "An OCaml library providing efficient access to a selection of character properties of the Unicode character database";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/uuidm/default.nix b/pkgs/development/ocaml-modules/uuidm/default.nix
index 78869f2f1306..07ba10a74a97 100644
--- a/pkgs/development/ocaml-modules/uuidm/default.nix
+++ b/pkgs/development/ocaml-modules/uuidm/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     description = "An OCaml module implementing 128 bits universally unique identifiers version 3, 5 (name based with MD5, SHA-1 hashing) and 4 (random based) according to RFC 4122";
     homepage = http://erratique.ch/software/uuidm;
     license = licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.maurer ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/uunf/default.nix b/pkgs/development/ocaml-modules/uunf/default.nix
index ece5fb5e3e3f..4e5d73e4cb37 100644
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "An OCaml module for normalizing Unicode text";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/uuseg/default.nix b/pkgs/development/ocaml-modules/uuseg/default.nix
index 0101c43e504d..5946fd2a70df 100644
--- a/pkgs/development/ocaml-modules/uuseg/default.nix
+++ b/pkgs/development/ocaml-modules/uuseg/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     description = "An OCaml library for segmenting Unicode text";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/uutf/default.nix b/pkgs/development/ocaml-modules/uutf/default.nix
index 26dc9742aeb4..7c4cff571280 100644
--- a/pkgs/development/ocaml-modules/uutf/default.nix
+++ b/pkgs/development/ocaml-modules/uutf/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Non-blocking streaming Unicode codec for OCaml";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/vg/default.nix b/pkgs/development/ocaml-modules/vg/default.nix
index bfff4c68cef9..17bb8eeb4645 100644
--- a/pkgs/development/ocaml-modules/vg/default.nix
+++ b/pkgs/development/ocaml-modules/vg/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     module. An API allows to implement new renderers.
     '';
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.jirkamarsik ];
   };
diff --git a/pkgs/development/ocaml-modules/x509/default.nix b/pkgs/development/ocaml-modules/x509/default.nix
index 0d9b657969d1..c44ccb18982a 100644
--- a/pkgs/development/ocaml-modules/x509/default.nix
+++ b/pkgs/development/ocaml-modules/x509/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://github.com/mirleft/ocaml-x509;
     description = "X509 (RFC5280) handling in OCaml";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.bsd2;
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
diff --git a/pkgs/development/ocaml-modules/xml-light/default.nix b/pkgs/development/ocaml-modules/xml-light/default.nix
index 5eb4fbfd6b15..82f635afb684 100644
--- a/pkgs/development/ocaml-modules/xml-light/default.nix
+++ b/pkgs/development/ocaml-modules/xml-light/default.nix
@@ -38,6 +38,6 @@ stdenv.mkDerivation {
     homepage = "http://tech.motion-twin.com/xmllight.html";
     license = stdenv.lib.licenses.lgpl21;
     maintainers = [ stdenv.lib.maintainers.romildo ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/xmlm/default.nix b/pkgs/development/ocaml-modules/xmlm/default.nix
index dacaeea49f4c..5dedfb396d5f 100644
--- a/pkgs/development/ocaml-modules/xmlm/default.nix
+++ b/pkgs/development/ocaml-modules/xmlm/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "An OCaml streaming codec to decode and encode the XML data format";
     homepage = "${webpage}";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.vbgl ];
     license = licenses.bsd3;
   };
diff --git a/pkgs/development/ocaml-modules/yojson/default.nix b/pkgs/development/ocaml-modules/yojson/default.nix
index 34bcc08275bd..ab949f4f1f22 100644
--- a/pkgs/development/ocaml-modules/yojson/default.nix
+++ b/pkgs/development/ocaml-modules/yojson/default.nix
@@ -29,6 +29,6 @@ stdenv.mkDerivation {
     homepage = "http://mjambon.com/${pname}.html";
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/ocaml-modules/zarith/default.nix b/pkgs/development/ocaml-modules/zarith/default.nix
index ccd278a2faaf..16a1ac3b30f2 100644
--- a/pkgs/development/ocaml-modules/zarith/default.nix
+++ b/pkgs/development/ocaml-modules/zarith/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     description = "fast, arbitrary precision OCaml integers";
     homepage    = "http://forge.ocamlcore.org/projects/zarith";
     license     = licenses.lgpl2;
-    platforms   = ocaml.meta.platforms;
+    platforms   = ocaml.meta.platforms or [];
     maintainers = with maintainers; [ thoughtpolice vbgl ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/zed/default.nix b/pkgs/development/ocaml-modules/zed/default.nix
index 935d3a566486..f9bf65cf8141 100644
--- a/pkgs/development/ocaml-modules/zed/default.nix
+++ b/pkgs/development/ocaml-modules/zed/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = https://github.com/diml/zed;
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
     ];
diff --git a/pkgs/development/tools/misc/trv/default.nix b/pkgs/development/tools/misc/trv/default.nix
index 0f99cabbb96b..606cc5146470 100644
--- a/pkgs/development/tools/misc/trv/default.nix
+++ b/pkgs/development/tools/misc/trv/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation {
     description = "Shim for vrt to enable bootstrapping";
     license = licenses.asl20;
     maintainers = [ maintainers.ericbmerritt ];
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/tools/ocaml/camlp4/default.nix b/pkgs/development/tools/ocaml/camlp4/default.nix
index 20373c923e7e..ae253180aee1 100644
--- a/pkgs/development/tools/ocaml/camlp4/default.nix
+++ b/pkgs/development/tools/ocaml/camlp4/default.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     description = "A software system for writing extensible parsers for programming languages";
     homepage = https://github.com/ocaml/camlp4;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/tools/ocaml/camlp5/5.15.nix b/pkgs/development/tools/ocaml/camlp5/5.15.nix
index adfdb4bd204c..e8cda36f101b 100644
--- a/pkgs/development/tools/ocaml/camlp5/5.15.nix
+++ b/pkgs/development/tools/ocaml/camlp5/5.15.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation {
     homepage = "${webpage}";
     license = stdenv.lib.licenses.bsd3;
     branch = "5";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
     ];
diff --git a/pkgs/development/tools/ocaml/camlp5/default.nix b/pkgs/development/tools/ocaml/camlp5/default.nix
index d9f364234308..83dd74d321ec 100644
--- a/pkgs/development/tools/ocaml/camlp5/default.nix
+++ b/pkgs/development/tools/ocaml/camlp5/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
     '';
     homepage = http://pauillac.inria.fr/~ddr/camlp5/;
     license = licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       z77z vbgl
     ];
diff --git a/pkgs/development/tools/ocaml/findlib/default.nix b/pkgs/development/tools/ocaml/findlib/default.nix
index 746be6dd0812..5d9757f2666e 100644
--- a/pkgs/development/tools/ocaml/findlib/default.nix
+++ b/pkgs/development/tools/ocaml/findlib/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     homepage = http://projects.camlcity.org/projects/findlib.html;
     description = "O'Caml library manager";
     license = stdenv.lib.licenses.mit;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.z77z
       stdenv.lib.maintainers.vbmithr
diff --git a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
index ca5230d1e086..3258aaf08c2f 100644
--- a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
+++ b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
     homepage = http://ocsigen.org/js_of_ocaml/;
     description = "Compiler of OCaml bytecode to Javascript. It makes it possible to run Ocaml programs in a Web browser";
     license = licenses.lgpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       maintainers.gal_bolle
     ];
diff --git a/pkgs/development/tools/ocaml/oasis/default.nix b/pkgs/development/tools/ocaml/oasis/default.nix
index e823466f4174..70d90752aceb 100644
--- a/pkgs/development/tools/ocaml/oasis/default.nix
+++ b/pkgs/development/tools/ocaml/oasis/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
     homepage = http://oasis.forge.ocamlcore.org/;
     description = "Configure, build and install system for OCaml projects";
     license = licenses.lgpl21;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
       vbgl z77z
     ];
diff --git a/pkgs/development/tools/ocaml/ocaml-top/default.nix b/pkgs/development/tools/ocaml/ocaml-top/default.nix
index 79c81c5c447c..9bea3e9dc17d 100644
--- a/pkgs/development/tools/ocaml/ocaml-top/default.nix
+++ b/pkgs/development/tools/ocaml/ocaml-top/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
     homepage = http://www.typerex.org/ocaml-top.html;
     license = stdenv.lib.licenses.gpl3;
     description = "A simple cross-platform OCaml code editor built for top-level evaluation";
-    platforms = ocamlPackages.ocaml.meta.platforms;
+    platforms = ocamlPackages.ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/tools/ocaml/ocamlify/default.nix b/pkgs/development/tools/ocaml/ocamlify/default.nix
index 0a402d4ba469..f3caa42b8fd7 100644
--- a/pkgs/development/tools/ocaml/ocamlify/default.nix
+++ b/pkgs/development/tools/ocaml/ocamlify/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = http://forge.ocamlcore.org/projects/ocamlmod/ocamlmod;
     description = "Generate OCaml modules from source files";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     license = stdenv.lib.licenses.lgpl21;
     maintainers = with stdenv.lib.maintainers; [
       z77z
diff --git a/pkgs/development/tools/ocaml/ocamlmod/default.nix b/pkgs/development/tools/ocaml/ocamlmod/default.nix
index 65359049a96d..7ff73ff28dc2 100644
--- a/pkgs/development/tools/ocaml/ocamlmod/default.nix
+++ b/pkgs/development/tools/ocaml/ocamlmod/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = http://forge.ocamlcore.org/projects/ocamlmod/ocamlmod;
     description = "Generate OCaml modules from source files";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [
       z77z
     ];
diff --git a/pkgs/development/tools/ocaml/ocamlscript/default.nix b/pkgs/development/tools/ocaml/ocamlscript/default.nix
index 1b37c21fdfa7..28efaf4cf3d2 100644
--- a/pkgs/development/tools/ocaml/ocamlscript/default.nix
+++ b/pkgs/development/tools/ocaml/ocamlscript/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     homepage = http://martin.jambon.free.fr/ocamlscript.html;
     license = licenses.boost;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     description = "Natively-compiled OCaml scripts";
     maintainers = [ maintainers.vbgl ];
   };
diff --git a/pkgs/development/tools/ocaml/ocp-build/default.nix b/pkgs/development/tools/ocaml/ocp-build/default.nix
index 31b99ada2a38..48657a8e19d0 100644
--- a/pkgs/development/tools/ocaml/ocp-build/default.nix
+++ b/pkgs/development/tools/ocaml/ocp-build/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
       between source files.
     '';
     license = licenses.gpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/tools/ocaml/ocp-indent/default.nix b/pkgs/development/tools/ocaml/ocp-indent/default.nix
index 224ce57808f9..d146dd5e9731 100644
--- a/pkgs/development/tools/ocaml/ocp-indent/default.nix
+++ b/pkgs/development/tools/ocaml/ocp-indent/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
     homepage = "http://typerex.ocamlpro.com/ocp-indent.html";
     description = "A customizable tool to indent OCaml code";
     license = licenses.gpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [ maintainers.jirkamarsik ];
   };
 }
diff --git a/pkgs/development/tools/ocaml/ocp-index/default.nix b/pkgs/development/tools/ocaml/ocp-index/default.nix
index 76be5f8bd47d..37f90c41100a 100644
--- a/pkgs/development/tools/ocaml/ocp-index/default.nix
+++ b/pkgs/development/tools/ocaml/ocp-index/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
     homepage = http://typerex.ocamlpro.com/ocp-index.html;
     description = "A simple and light-weight documentation extractor for OCaml";
     license = stdenv.lib.licenses.lgpl3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }
diff --git a/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix b/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
index 40188734a996..9f318afc67d7 100644
--- a/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
+++ b/pkgs/development/tools/ocaml/omake/0.9.8.6-rc1.nix
@@ -33,6 +33,6 @@ stdenv.mkDerivation {
     description = "Omake build system";
     homepage = "${webpage}";
     license = "GPL";
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }
diff --git a/pkgs/development/tools/ocaml/utop/default.nix b/pkgs/development/tools/ocaml/utop/default.nix
index c9addf55312c..b5de65b7c10f 100644
--- a/pkgs/development/tools/ocaml/utop/default.nix
+++ b/pkgs/development/tools/ocaml/utop/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = https://github.com/diml/utop;
     license = stdenv.lib.licenses.bsd3;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
     maintainers = [
       stdenv.lib.maintainers.gal_bolle
     ];
diff --git a/pkgs/tools/audio/liquidsoap/full.nix b/pkgs/tools/audio/liquidsoap/full.nix
index eeebea5d7475..318bb2859e54 100644
--- a/pkgs/tools/audio/liquidsoap/full.nix
+++ b/pkgs/tools/audio/liquidsoap/full.nix
@@ -40,6 +40,6 @@ stdenv.mkDerivation {
     homepage = http://liquidsoap.fm/;
     maintainers = with maintainers; [ ehmry ];
     license = licenses.gpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }