Improve nix development shell

flake.nix

@@ -10,11 +10,8 @@
       let
         pkgs = import nixpkgs { inherit system; };
         naersk-lib = pkgs.callPackage naersk { };
-      in
+
-      {
+        # Needed at compile time (on build system)
-        defaultPackage = naersk-lib.buildPackage
-          {
-            src = ./.;
         nativeBuildInputs = with pkgs; [
           gtk4
           cairo
@@ -23,7 +20,22 @@
           poppler
           wrapGAppsHook
         ];
+        # Needed at runtime (on run system)
+        buildInputs = with pkgs; [ ];
+      in rec {
+        defaultPackage = naersk-lib.buildPackage {
+          src = ./.;
+          inherit buildInputs;
+          inherit nativeBuildInputs;
         };
+        devShell = with pkgs;
+          mkShell {
+            buildInputs =
+              [ cargo rustc rustfmt pre-commit rustPackages.clippy ];
+            # Without inheriting nativeBuildinputs, cargo build will fail but that is good since we want to use only nix build
+            # inherit nativeBuildInputs;
 
+            RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          };
       });
 }