add flake.nix

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "Linux based GDDR6/GDDR6X VRAM temperature reader for NVIDIA RTX 3000/4000 series GPUs.";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils }:
+  utils.lib.eachDefaultSystem(system:
+    let
+      pkgs = import nixpkgs { inherit system; };
+    in {
+      packages.gddr6 = with pkgs; stdenv.mkDerivation {
+        pname = "gddr6";
+        version = "unstable";
+
+        src = ./.;
+
+        buildInputs = [ cmake ];
+        nativeBuildInputs = [ pciutils ];
+      };
+
+      packages.default = self.packages.${system}.gddr6;
+
+      devShell = with pkgs; mkShell {
+        name = "gddr6";
+        nativeBuildInputs = [ cmake pciutils ];
+      };
+    }
+  );
+}
+