diff --git a/pkgs/development/idris-modules/default.nix b/pkgs/development/idris-modules/default.nix
index 9c7ba500961c..c333fa9064f1 100644
--- a/pkgs/development/idris-modules/default.nix
+++ b/pkgs/development/idris-modules/default.nix
@@ -65,7 +65,7 @@ let
 
       # The set of libraries that comes with idris
 
-      builtins = pkgs.lib.mapAttrsToList (name: value: value) builtins_;
+      builtins = pkgs.lib.attrValues builtins_;
 
       # Libraries