monitorcontrol: init at 4.1.0

pkgs/applications/misc/monitorcontrol/default.nix

···
+{ lib, fetchurl, stdenv, undmg }:
+
+# This cannot be built from source due to the problematic nature of XCode - so
+# this is what it's like when doves cry?
+
+stdenv.mkDerivation rec {
+  pname = "MonitorControl";
+  version = "4.1.0";
+
+  src = fetchurl {
+    url =
+      "https://github.com/MonitorControl/${pname}/releases/download/v${version}/MonitorControl.${version}.dmg";
+    sha256 = "iaxM9j78Sq1EH5TCY240N+D5bG6quk2dZj8T7nt9ATo=";
+  };
+
+  nativeBuildInputs = [ undmg ];
+
+  sourceRoot = "MonitorControl.app";
+
+  installPhase = ''
+    mkdir -p "$out/Applications/MonitorControl.app"
+    cp -R . "$out/Applications/MonitorControl.app"
+  '';
+
+  meta = with lib; {
+    description = "A macOS system extension to control brightness and volume of external displays with native OSD";
+    longDescription = "Controls your external display brightness and volume and shows native OSD. Use menulet sliders or the keyboard, including native Apple keys!";
+    homepage = "https://github.com/MonitorControl/MonitorControl#readme";
+    license = licenses.mit;
+    maintainers = with maintainers; [ cbleslie ];
+    platforms = platforms.darwin;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   mod-distortion = callPackage ../applications/audio/mod-distortion { };
 
+  monitorcontrol = callPackage ../applications/misc/monitorcontrol { };
+
   xmr-stak = callPackage ../applications/misc/xmr-stak { };
 
   xmrig = callPackage ../applications/misc/xmrig { };