Added a flake.nix

flake.nix

@@ -0,0 +1,34 @@
+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+  flake-utils.lib.eachDefaultSystem (system:
+  let
+    pkgs = import nixpkgs { };
+  in
+  {
+    packages.default = pkgs.rustPlatform.buildRustPackage {
+      pname = "fern";
+      version = "0.1.0";
+
+      src = self;
+
+      cargoLock = {
+        lockFile = ./Cargo.lock;
+      };
+
+      meta = with pkgs.lib; {
+        description = "A Linux shell written in Rust";
+        homepage = "https://github.com/km-clay/fern";
+        license = licenses.mit;
+        maintainers = [ ];
+        platforms = platforms.linux;
+      };
+    };
+  });
+}