usbkvm: remove udev rules hack, use udevrulesdir meson option

pkgs/by-name/us/usbkvm/package.nix

@@ -11,6 +11,7 @@
   pkg-config,
   python3,
   stdenv,
+  udev,
   wrapGAppsHook3,
 }:
 
@@ -51,6 +52,7 @@ stdenv.mkDerivation {
     ninja
     makeWrapper
     wrapGAppsHook3
+    udev
   ];
 
   buildInputs = [
@@ -71,6 +73,11 @@ stdenv.mkDerivation {
       --replace-fail "@MSLIB_H_PRECOMPILED@" "${ms-tools-lib}/mslib.h"
   '';
 
+  # Install udev rules in this package's out path:
+  mesonFlags = [
+    "-Dudevrulesdir=lib/udev/rules.d"
+  ];
+
   postFixup =
     let
       GST_PLUGIN_PATH = lib.makeSearchPathOutput "lib" "lib/gstreamer-1.0" [
@@ -83,11 +90,6 @@ stdenv.mkDerivation {
         --prefix GST_PLUGIN_PATH : "${GST_PLUGIN_PATH}"
     '';
 
-  postInstall = ''
-    mkdir -p $out/lib/udev/rules.d/
-    cp ../70-usbkvm.rules $out/lib/udev/rules.d/
-  '';
-
   meta = {
     homepage = "https://github.com/carrotIndustries/usbkvm";
     description = "An open-source USB KVM (Keyboard, Video and Mouse) adapter";