diff --git a/pkgs/development/interpreters/ruby/gem.nix b/pkgs/development/interpreters/ruby/gem.nix
index 8ec80b785de..124c7cd747f 100644
--- a/pkgs/development/interpreters/ruby/gem.nix
+++ b/pkgs/development/interpreters/ruby/gem.nix
@@ -43,12 +43,6 @@ let
     '';
 
     propagatedUserEnvPkgs = requiredGems;
-    postFixup = ''
-      if [ -n "$propagatedUserEnvPkgs" ]; then
-          mkdir -p "$out/nix-support"
-          echo "$propagatedUserEnvPkgs" > "$out/nix-support/propagated-user-env-packages"
-      fi
-    '';
 
   };
   mb = stdenv.lib.maybeAttr;