diff --git a/extra/language/ruby.nix b/extra/language/ruby.nix
index 55d3ebb5..36bc8727 100644
--- a/extra/language/ruby.nix
+++ b/extra/language/ruby.nix
@@ -34,7 +34,7 @@ with lib;
     devshell.packages = with pkgs; [
       cfg.package
       # Used by mkmf, the standard gem build tool
-      (lowPrio binutils)
+      (lib.lowPrio binutils)
       file
       findutils
       gnumake