diff --git a/pkgs/development/libraries/nss/generic.nix b/pkgs/development/libraries/nss/generic.nix
index b4330796e52..8badbf9e876 100644
--- a/pkgs/development/libraries/nss/generic.nix
+++ b/pkgs/development/libraries/nss/generic.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     patchShebangs nss
 
-    for f in nss/coreconf/config.gypi nss/build.sh nss/coreconf/config.gypi; do
+    for f in nss/coreconf/config.gypi nss/build.sh; do
       substituteInPlace "$f" --replace "/usr/bin/env" "${buildPackages.coreutils}/bin/env"
     done