diff --git a/pkgs/development/ruby-modules/bundled-common/functions.nix b/pkgs/development/ruby-modules/bundled-common/functions.nix
index 746eb2bb112a..57a10dadc400 100644
--- a/pkgs/development/ruby-modules/bundled-common/functions.nix
+++ b/pkgs/development/ruby-modules/bundled-common/functions.nix
@@ -80,6 +80,8 @@ in rec {
           outputs = [ "out" ];
           out = res;
           outputName = "out";
+          suffix = version;
+          gemType = "path";
         };
     in res;