* - make NixOS derivation file

nix/default.nix

@@ -0,0 +1,35 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation rec {
+    name = "com.github.lainsce.khronos";
+    version = "1.0.5";
+
+    src = fetchFromGitHub {
+        owner = "lainsce";
+        repo = "khronos";
+        rev = "1.0.5";
+	sha256 = "0dk1b2d82gli3z35dn5p002lfkgq326janql0vn1z5hs8jvjakqh";
+    };
+
+    postPatch = ''
+    	chmod +x meson/post_install.py
+    	patchShebangs meson/post_install.py
+    '';
+
+    buildInputs = [
+	libgee
+	gtk3
+	json-glib
+	pantheon.granite
+    ];
+
+    nativeBuildInputs = [
+	desktop-file-utils
+    	meson
+    	ninja
+    	pkgconfig
+    	python3
+    	vala
+    	wrapGAppsHook
+    ];
+}