Add devenv registry

modules/devenv/rust.nix

@@ -0,0 +1,28 @@
+outerInputs @ { inputs, ... }: let
+  pkgs = outerInputs.pkgs.appendOverlays [ (import inputs.rust-overlay) ];
+in pkgs.mkShell {
+  name = "rust-devenv";
+  packages = with pkgs; [
+    (rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
+      extensions = [
+        "rustc"
+        "rust-src"
+        "rust-docs"
+        "rust-std"
+        "cargo"
+        "clippy"
+        "rust-analyzer"
+        "miri"
+      ];
+    }))
+
+    cargo-expand
+
+    # common deps
+    clang
+    pkg-config
+    openssl.dev
+  ];
+
+  shellHook = "exec $SHELL";
+}