diff --git a/pkgs/development/libraries/nss/default.nix b/pkgs/development/libraries/nss/default.nix
index e71e2ef3f9d..414e66864c1 100644
--- a/pkgs/development/libraries/nss/default.nix
+++ b/pkgs/development/libraries/nss/default.nix
@@ -4,11 +4,6 @@
 
 let
 
-  nssConfig = fetchurl {
-    url = "http://sources.gentoo.org/viewcvs.py/*checkout*/gentoo-x86/dev-libs/nss/files/3.12-nss-config.in?rev=1.2";
-    sha256 = "1ck9q68fxkjq16nflixbqi4xc6bmylmj994h3f1j42g8mp0xf0vd";
-  };
-
   nssPEM = fetchgit {
     url = "git://git.fedorahosted.org/git/nss-pem.git";
     rev = "07a683505d4a0a1113c4085c1ce117425d0afd80";
@@ -65,34 +60,15 @@ in stdenv.mkDerivation rec {
 
   buildFlags = [ "build_coreconf" "build_dbm" "all" ];
 
-  postInstall =
-    ''
-      #find $out -name "*.a" | xargs rm
-      rm -rf $out/private
-      mv $out/public $out/include
-      mv $out/*.OBJ/* $out/
-      rmdir $out/*.OBJ
-      ${if includeTools then "" else "rm -rf $out/bin"}
+  postInstall = ''
+    rm -rf $out/private
+    mv $out/public $out/include
+    mv $out/*.OBJ/* $out/
+    rmdir $out/*.OBJ
+    ${if includeTools then "" else "rm -rf $out/bin; mkdir $out/bin"}
 
-      # Borrowed from Gentoo.  Firefox expects an nss-config script,
-      # but NSS doesn't provide it.
-
-      NSS_VMAJOR=`cat lib/nss/nss.h | grep "#define.*NSS_VMAJOR" | awk '{print $3}'`
-      NSS_VMINOR=`cat lib/nss/nss.h | grep "#define.*NSS_VMINOR" | awk '{print $3}'`
-      NSS_VPATCH=`cat lib/nss/nss.h | grep "#define.*NSS_VPATCH" | awk '{print $3}'`
-
-      ${if includeTools then "" else "mkdir $out/bin"}
-      cp ${nssConfig} $out/bin/nss-config
-      chmod u+x $out/bin/nss-config
-      substituteInPlace $out/bin/nss-config \
-        --subst-var-by MOD_MAJOR_VERSION $NSS_VMAJOR \
-        --subst-var-by MOD_MINOR_VERSION $NSS_VMINOR \
-        --subst-var-by MOD_PATCH_VERSION $NSS_VPATCH \
-        --subst-var-by prefix $out \
-        --subst-var-by exec_prefix $out \
-        --subst-var-by includedir $out/include/nss \
-        --subst-var-by libdir $out/lib
-    ''; # */
+    cp -av config/nss-config $out/bin/nss-config
+  '';
 
   postFixup = ''
     for libname in freebl3 nssdbm3 softokn3