additional nix tooling

.envrc

@@ -0,0 +1,5 @@
+watch_file flake.nix
+watch_file flake.lock
+watch_dir nix
+
+use flake

flake.nix

@@ -13,5 +13,9 @@
     packages = forEachSystem (system: {
       default = pkgsForEach.${system}.callPackage ./nix/package.nix {};
     });
+
+    devShells = forEachSystem (system: {
+      default = pkgsForEach.${system}.callPackage ./nix/shell.nix {};
+    });
   };
 }

nix/shell.nix

@@ -0,0 +1,25 @@
+{
+  mkShell,
+  rust-analyzer-unwrapped,
+  rustfmt,
+  clippy,
+  cargo,
+  rustc,
+  gcc,
+  rustPlatform,
+}:
+mkShell {
+  strictDeps = true;
+
+  nativeBuildInputs = [
+    cargo
+    rustc
+    gcc
+
+    rust-analyzer-unwrapped
+    rustfmt
+    clippy
+  ];
+
+  env.RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
+}