Add Nix support

README.md

@@ -59,6 +59,16 @@ The most convenient way is by running the following bash one-liner:
 curl -O https://raw.githubusercontent.com/18alantom/fex/master/install.sh && bash install.sh
 ```
 
+If you are a Nix user, just run one of the following commands:
+
+```bash
+# Run the program immediately:
+nix run github:18alantom/fex
+
+# Enter a temporary shell with `fex` available:
+nix shell github:18alantom/fex
+```
+
 Getting `fex` running involves:
 
 1. Installing the `fex` executable.

default.nix

@@ -0,0 +1,19 @@
+{
+  stdenv,
+  fetchFromGitHub,
+  zig,
+  ...
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "fex";
+  version = "v0.1.1";
+
+  src = fetchFromGitHub {
+    owner = "18alantom";
+    repo = finalAttrs.pname;
+    rev = finalAttrs.version;
+    hash = "sha256-9DY+q3ucJC13oSUdj2cp40P4IeFLxCOU03h/jgjmoaU=";
+  };
+
+  nativeBuildInputs = [ zig.hook ];
+})

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "A command-line file explorer prioritizing quick navigation.";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs =
+    { nixpkgs, flake-parts, ... }@inputs:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "aarch64-darwin"
+        # "aarch64-linux"
+        "x86_64-darwin"
+        "x86_64-linux"
+      ];
+
+      perSystem =
+        { pkgs, ... }:
+        {
+          packages = rec {
+            default = fex;
+            fex = pkgs.callPackage ./. { };
+          };
+        };
+    };
+}