added nix flake

.gitignore

@@ -10,3 +10,6 @@ testdata
 # Folders
 completions/
 manpages/
+
+# nix
+result

flake.lock

@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1660639432,
+        "narHash": "sha256-2WDiboOCfB0LhvnDVMXOAr8ZLDfm3WdO54CkoDPwN1A=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6c6409e965a6c883677be7b9d87a95fab6c3472e",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,16 @@
+{
+    outputs = {self, nixpkgs, ...}:
+    let
+        system="x86_64-linux";
+        pkgs=import nixpkgs {inherit system;};
+    in
+    {
+        packages.${system}.default = pkgs.buildGoModule {
+            name = "gum";
+            src = self;
+            vendorSha256="vvNoO5eABGVwvAzK33uPelmo3BKxfqiYgEXZI7kgeSo=";
+        };
+        
+    };
+
+}