openrgb: Fix udev rules with hardcoded /bin/chmod

New rules introduced in openrgb 0.6.

openrgb: Implement nixpkgs-review suggestions

* warning: missing-phase-hooks
* warning: unclear-gpl
* warning: unnecessary-parallel-building

pkgs/applications/misc/openrgb/default.nix

@@ -1,4 +1,4 @@
-{ lib, mkDerivation, fetchFromGitLab, qmake, libusb1, hidapi, pkg-config }:
+{ lib, mkDerivation, fetchFromGitLab, qmake, libusb1, hidapi, pkg-config, coreutils }:
 
 mkDerivation rec {
   pname = "openrgb";
@@ -15,11 +15,18 @@ mkDerivation rec {
   buildInputs = [ libusb1 hidapi ];
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/bin
     cp openrgb $out/bin
 
+    substituteInPlace 60-openrgb.rules \
+      --replace /bin/chmod "${coreutils}/bin/chmod"
+
     mkdir -p $out/etc/udev/rules.d
     cp 60-openrgb.rules $out/etc/udev/rules.d
+
+    runHook postInstall
   '';
 
   doInstallCheck = true;
@@ -27,13 +34,11 @@ mkDerivation rec {
     HOME=$TMPDIR $out/bin/openrgb --help > /dev/null
   '';
 
-  enableParallelBuilding = true;
-
   meta = with lib; {
     description = "Open source RGB lighting control";
     homepage = "https://gitlab.com/CalcProgrammer1/OpenRGB";
     maintainers = with maintainers; [ jonringer ];
-    license = licenses.gpl2;
+    license = licenses.gpl2Plus;
     platforms = platforms.linux;
   };
 }