Add openrazer overlays

overlay.nix

@@ -15,6 +15,7 @@ let
 in
 {
   nixpkgs.overlays = [
+    (import ./overlays/openrazer)
     overlay-unstable
     overlay-needs-unstable
     overlay-imported

overlays/openrazer/default.nix

@@ -0,0 +1,29 @@
+final: prev:
+let
+  src = final.fetchFromGitHub {
+    owner = "natsukagami";
+    repo = "openrazer";
+    rev = "28cd304e0389d26ded2a274b0f9ecd2debf057a0";
+    sha256 = "sha256-8vCR8/eZq0z0+K1vajjt9wDcV/2QwX9JJh9usWAEvBg=";
+  };
+in rec
+{
+  openrazer-daemon = prev.openrazer-daemon.overrideAttrs (old: {
+    inherit src;
+  });
+
+  python3 = prev.python3.override {
+    packageOverrides = self: super: {
+      openrazer-daemon = super.openrazer-daemon.overrideAttrs (old: {
+        inherit src;
+      });
+    };
+  };
+  python3Packages = python3.pkgs;
+
+  linuxPackages = prev.linuxPackages.extend (self: super: {
+    openrazer = super.openrazer.overrideAttrs (old: {
+      inherit src;
+    });
+  });
+}