misc: Add everything

packages/gamemode/default.nix

@@ -0,0 +1,33 @@
+{ stdenv, lib,
+  meson, ninja, dbus, systemd, pkgconfig, cmake, inih,
+  fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "gamemode";
+  version = "1.6.1";
+
+  src = fetchFromGitHub {
+    owner = "FeralInteractive";
+    repo = pname;
+    rev = version;
+    sha256 = "17dck7dzkmzq52f2yrs930fdg2inr7nipvnwpd0jqrwgk2fhwk9z";
+  };
+
+  nativeBuildInputs = [
+    meson ninja pkgconfig cmake
+  ];
+
+  buildInputs = [
+    dbus systemd inih
+  ];
+
+  mesonFlags = [ "-Dwith-systemd-user-unit-dir=${placeholder "out"}/lib/systemd/user" ];
+  
+  meta = with lib; {
+    description = "Optimise Linux system performance on demand";
+    homepage = "https://github.com/FeralInteractive/gamemode";
+    license = licenses.bsd3;
+    maintainers = [ ];
+    platforms = platforms.linux;
+  };
+}