diff --git a/pkgs/servers/sks/default.nix b/pkgs/servers/sks/default.nix
index 9149f050655c..1d3b04565c86 100644
--- a/pkgs/servers/sks/default.nix
+++ b/pkgs/servers/sks/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromBitbucket, ocaml, zlib, db48, perl }:
+{ stdenv, fetchFromBitbucket, ocaml, zlib, db48, perl, camlp4 }:
 
 stdenv.mkDerivation rec {
   name = "sks-${version}";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "00q5ma5rvl10rkc6cdw8d69bddgrmvy0ckqj3hbisy65l4idj2zm";
   };
 
-  buildInputs = [ ocaml zlib db48 perl ];
+  buildInputs = [ ocaml zlib db48 perl camlp4 ];
 
   makeFlags = [ "PREFIX=$(out)" "MANDIR=$(out)/share/man" ];
   preConfigure = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e0c3edad5f1f..84d8931c02e6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3830,7 +3830,7 @@ with pkgs;
 
   skippy-xd = callPackage ../tools/X11/skippy-xd {};
 
-  sks = callPackage ../servers/sks { };
+  sks = callPackage ../servers/sks { inherit (ocamlPackages) ocaml camlp4; };
 
   skydns = callPackage ../servers/skydns { };