diff --git a/pkgs/development/interpreters/ruby/bundix.nix b/pkgs/development/interpreters/ruby/bundix.nix
index f662517b2de..691b4c5e979 100644
--- a/pkgs/development/interpreters/ruby/bundix.nix
+++ b/pkgs/development/interpreters/ruby/bundix.nix
@@ -37,7 +37,7 @@ in
       rubyLibs = rubyLibsWith ruby;
       gems = rubyLibs.importGems gemset (config.gemOverrides or (gemset: {}));
     in {
-      inherit ruby; # TODO: Set ruby using expr.rubyVersion if not given.
+      inherit ruby gems; # TODO: Set ruby using expr.rubyVersion if not given.
       gemPath = map (drv: "${drv}") (
         builtins.filter (value: lib.isDerivation value) (lib.attrValues gems)
       );