diff --git a/pkgs/development/interpreters/ruby/gem.nix b/pkgs/development/interpreters/ruby/gem.nix
index 289f840aa04..a64f10e268c 100644
--- a/pkgs/development/interpreters/ruby/gem.nix
+++ b/pkgs/development/interpreters/ruby/gem.nix
@@ -40,6 +40,15 @@ let
 
       runHook postInstall
     '';
+
+    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;
   patchedGem = a: stdenv.mkDerivation (removeAttrs (stdenv.lib.mergeAttrsByFuncDefaults