add rust package to flake

flake.nix

@@ -7,20 +7,23 @@
   outputs = { self, nixpkgs, ... }@inputs:
     let
      system = "x86_64-linux";
-     pkgs = nixpkgs.legacyPackages.${system};    
-    in
-    {
-      devShells.${system}.default = pkgs.mkShell
-      {
+     pkgs = nixpkgs.legacyPackages.${system};
+     common = {
+        buildInputs = [ pkgs.openssl ];
+        nativeBuildInputs = [ pkgs.pkg-config ];
+     };
+    in {
+      devShells.${system}.default = pkgs.mkShell ({
         packages = with pkgs; [
           rustc
           cargo
         ];
-        buildInputs = with pkgs; [
-          openssl
-        ];
-        nativeBuildInputs = [ pkgs.pkg-config ];
-        # env.RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rust}";
-      };
+      } // common);
+
+      packages.${system}.default = pkgs.rustPlatform.buildRustPackage ({
+        name = "icomidal";
+        src = ./.;
+        cargoHash = "sha256-vaMAQmDT2ZCZTbI9Kp/5MOTbe1a1DFqTKlcQqvR4vxA=";
+      } // common);
     };
 }