python310Packages.nftables: init from pkgs.nftables, reduce with lib; usage over enitre file

pkgs/os-specific/linux/nftables/default.nix

···
 , withXtables ? true , iptables
 }:
 
-with lib;
-
 stdenv.mkDerivation rec {
   version = "1.0.2";
   pname = "nftables";
···
   buildInputs = [
     libmnl libnftnl libpcap
     gmp jansson libedit
-  ] ++ optional withXtables iptables
-    ++ optional withPython python3;
+  ] ++ lib.optional withXtables iptables
+    ++ lib.optional withPython python3;
 
   preConfigure = ''
     substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file
···
   configureFlags = [
     "--with-json"
     "--with-cli=editline"
-  ] ++ optional (!withDebugSymbols) "--disable-debug"
-    ++ optional (!withPython) "--disable-python"
-    ++ optional withPython "--enable-python"
-    ++ optional withXtables "--with-xtables";
+  ] ++ lib.optional (!withDebugSymbols) "--disable-debug"
+    ++ lib.optional (!withPython) "--disable-python"
+    ++ lib.optional withPython "--enable-python"
+    ++ lib.optional withXtables "--with-xtables";
 
-  meta = {
+  meta = with lib; {
     description = "The project that aims to replace the existing {ip,ip6,arp,eb}tables framework";
     homepage = "https://netfilter.org/projects/nftables/";
     license = licenses.gpl2Only;

pkgs/top-level/python-packages.nix

···
 
   nextcord = callPackage ../development/python-modules/nextcord { };
 
+  nftables = toPythonModule (pkgs.nftables.override {
+    python3 = python;
+    withPython = true;
+  });
+
   nghttp2 = (toPythonModule (pkgs.nghttp2.override {
     inherit (self) python cython setuptools;
     inherit (pkgs) ncurses;