sway: remove gtk window decoration

pkgs/default.nix

@@ -6,4 +6,5 @@
   cargo-checkmate = pkgs.callPackage ./cargo-checkmate.nix { };
   lipsum = pkgs.callPackage ./lipsum.nix { inherit inputs; };
   amdgpu-kernel-module = pkgs.callPackage ./amdgpu-kernel-module.nix { };
+  gtk3-nocsd = pkgs.callPackage ./gtk3-nocsd.nix { };
 }

pkgs/gtk3-nocsd.nix

@@ -0,0 +1,40 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, pkgconfig
+, gtk3
+, gobject-introspection
+}:
+
+stdenv.mkDerivation rec {
+  pname = "gtk3-nocsd";
+  version = "3.0.1";
+
+  src = fetchFromGitHub {
+    owner = "ZaWertun";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "035rrn9jq9bdfkmmj6xl4q8paqx7xf3hxsw6gslgk86sh7x56lvi";
+  };
+
+  buildInputs = [
+    gtk3
+    gobject-introspection
+  ];
+
+  nativeBuildInputs = [
+    pkgconfig
+  ];
+
+  makeFlags = [
+    "prefix=${placeholder "out"}"
+  ];
+
+  meta = with lib; {
+    description = "A hack to disable gtk+ 3 client side decoration";
+    homepage = https://github.com/PCMan/gtk3-nocsd;
+    license = licenses.lgpl21Plus;
+    # maintainers = with maintainers; [ peanutbutter144 ];
+    platforms = platforms.linux;
+  };
+}