python3.pkgs.pyudev: use lib.getLib systemd instead of systemd.lib

This will pick the `lib` output if it exists, otherwise default to `out`.

pkgs/development/python-modules/pyudev/default.nix

@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace src/pyudev/_ctypeslib/utils.py \
-      --replace "find_library(name)" "'${systemd.lib}/lib/libudev.so'"
+      --replace "find_library(name)" "'${lib.getLib systemd}/lib/libudev.so'"
     '';
 
   checkInputs = [ pytest mock hypothesis docutils ];