Improve nix development shell

flake.nix

@@ -10,20 +10,32 @@
       let
         pkgs = import nixpkgs { inherit system; };
         naersk-lib = pkgs.callPackage naersk { };
-      in
-      {
-        defaultPackage = naersk-lib.buildPackage
-          {
-            src = ./.;
-            nativeBuildInputs = with pkgs; [
-              gtk4
-              cairo
-              glib
-              pkg-config
-              poppler
-              wrapGAppsHook
-            ];
-          };
 
+        # Needed at compile time (on build system)
+        nativeBuildInputs = with pkgs; [
+          gtk4
+          cairo
+          glib
+          pkg-config
+          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;
+          };
       });
 }