diff --git a/pkgs/applications/editors/idea/default.nix b/pkgs/applications/editors/idea/default.nix
index e5cfbcdfe178..7cb99ae80ccc 100644
--- a/pkgs/applications/editors/idea/default.nix
+++ b/pkgs/applications/editors/idea/default.nix
@@ -2,6 +2,8 @@
 , coreutils, gnugrep, which, git
 }:
 
+assert stdenv.isLinux;
+
 let
 
   buildIdea =
diff --git a/pkgs/applications/ike/default.nix b/pkgs/applications/ike/default.nix
index 1414310ebf33..48f277ad4c98 100644
--- a/pkgs/applications/ike/default.nix
+++ b/pkgs/applications/ike/default.nix
@@ -1,6 +1,8 @@
 { stdenv, fetchurl, cmake, openssl, libedit, flex, bison, qt4, makeWrapper
 , gcc, nettools, iproute, linuxHeaders }:
 
+assert stdenv.isLinux;
+
 # NOTE: use $out/etc/iked.conf as sample configuration and also set: dhcp_file "/etc/iked.dhcp";
 # launch with "iked -f /etc/iked.conf"
 
diff --git a/pkgs/applications/science/logic/verifast/default.nix b/pkgs/applications/science/logic/verifast/default.nix
index 7ab08cf8799f..2685f5e53d06 100644
--- a/pkgs/applications/science/logic/verifast/default.nix
+++ b/pkgs/applications/science/logic/verifast/default.nix
@@ -1,6 +1,8 @@
 { stdenv, fetchurl, gtk, gdk_pixbuf, atk, pango, glib, cairo, freetype
 , fontconfig, libxml2, gnome2 }:
 
+assert stdenv.isLinux;
+
 let
   libPath = stdenv.lib.makeLibraryPath
     [ stdenv.gcc.libc stdenv.gcc.gcc gtk gdk_pixbuf atk pango glib cairo
diff --git a/pkgs/applications/science/logic/yices/default.nix b/pkgs/applications/science/logic/yices/default.nix
index 5a1a4ef19922..b6b34d96d154 100644
--- a/pkgs/applications/science/logic/yices/default.nix
+++ b/pkgs/applications/science/logic/yices/default.nix
@@ -1,5 +1,7 @@
 { stdenv, fetchurl }:
 
+assert stdenv.isLinux;
+
 let
   libPath = stdenv.lib.makeLibraryPath [ stdenv.gcc.libc ];
 in
diff --git a/pkgs/development/compilers/cryptol/1.8.x.nix b/pkgs/development/compilers/cryptol/1.8.x.nix
index 4cf00ad3806d..17382ed9d567 100644
--- a/pkgs/development/compilers/cryptol/1.8.x.nix
+++ b/pkgs/development/compilers/cryptol/1.8.x.nix
@@ -1,5 +1,7 @@
 { stdenv, requireFile, gmp4, ncurses, zlib, clang_33, makeWrapper }:
 
+assert stdenv.isLinux;
+
 let
   name    = "cryptol-${version}-${rev}";
   version = "1.8.27";
diff --git a/pkgs/os-specific/linux/kernel/generic.nix b/pkgs/os-specific/linux/kernel/generic.nix
index 08611e448562..13250e45494f 100644
--- a/pkgs/os-specific/linux/kernel/generic.nix
+++ b/pkgs/os-specific/linux/kernel/generic.nix
@@ -28,6 +28,7 @@
 }:
 
 assert stdenv.platform.name == "sheevaplug" -> stdenv.platform.uboot != null;
+assert stdenv.isLinux;
 
 let
 
diff --git a/pkgs/servers/http/openresty/default.nix b/pkgs/servers/http/openresty/default.nix
index e301cc429b9e..571cd215356c 100644
--- a/pkgs/servers/http/openresty/default.nix
+++ b/pkgs/servers/http/openresty/default.nix
@@ -1,6 +1,8 @@
 { stdenv, fetchurl, fetchgit, openssl, zlib, pcre, libxml2, libxslt, gd, geoip
 , perl }:
 
+assert stdenv.isLinux;
+
 with stdenv.lib;
 
 stdenv.mkDerivation rec {
@@ -53,7 +55,7 @@ stdenv.mkDerivation rec {
     description = "A fast web application server built on Nginx";
     homepage    = http://openresty.org;
     license     = licenses.bsd2;
-    platforms   = platforms.all;
+    platforms   = platforms.linux;
     maintainers = with maintainers; [ thoughtpolice ];
   };
 }
diff --git a/pkgs/tools/security/hashcat/default.nix b/pkgs/tools/security/hashcat/default.nix
index 5e1737241904..699901ad59e9 100644
--- a/pkgs/tools/security/hashcat/default.nix
+++ b/pkgs/tools/security/hashcat/default.nix
@@ -1,5 +1,7 @@
 { stdenv, fetchurl, p7zip, patchelf }:
 
+assert stdenv.isLinux;
+
 let
   bits    = if stdenv.system == "x86_64-linux" then "64" else "32";
   libPath = stdenv.lib.makeLibraryPath [ stdenv.gcc.libc ];