diff --git a/overlay.nix b/overlay.nix
index df21edfa..e889d0e7 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -1,9 +1,11 @@
 final: /* Future last stage */
 prev:  /* Previous stage */
 
-with final.lib;
-
 let
+
+  inherit (prev) lib;
+  inherit (lib) collect filterAttrs isDerivation mapAttrs;
+
   callPackage = final.callPackage;
 
   mkStrict = drv: if (isDerivation drv && drv ? overrideAttrs && !(drv ? strictDeps))