Add flake.nix

.envrc

@@ -0,0 +1 @@
+use flake

flake.nix

@@ -0,0 +1,27 @@
+{
+  description = "Elixir system monitor daemon";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            elixir
+            erlang
+          ];
+
+          shellHook = ''
+            echo "Elixir development environment loaded"
+            elixir --version
+          '';
+        };
+      });
+}