Revert "lib: Use lib.fixed-points.extends to avoid repetition"

This reverts commit 48ccdf322d9e7a68d0caf5833511ee3e53ec7d3a.

Changed files
+1 -1
lib
+1 -1
lib/customisation.nix
···
callPackage = self.newScope {};
overrideScope = g:
makeScope newScope
-
(lib.fixed-points.extends f g);
+
(self_: let super = f self_; in super // g super self_);
packages = f;
};
in self;