diff --git a/pkgs/games/cataclysm-dda/pkgs/default.nix b/pkgs/games/cataclysm-dda/pkgs/default.nix
index 2c8fe3f14d0a..39abad809c5b 100644
--- a/pkgs/games/cataclysm-dda/pkgs/default.nix
+++ b/pkgs/games/cataclysm-dda/pkgs/default.nix
@@ -13,9 +13,9 @@ let
     };
   };
 
-  pkgs' = lib.mapAttrs (_: mod: lib.filterAttrs availableForBuild mod) pkgs;
+  pkgs' = lib.mapAttrs (_: mods: lib.filterAttrs isAvailable mods) pkgs;
 
-  availableForBuild = _: mod:
+  isAvailable = _: mod:
   if isNull build then
     true
   else if build.isTiles then