Fix flake package

flake.lock

@@ -30,6 +30,24 @@
         "type": "github"
       }
     },
+    "helix": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1623200791,
+        "narHash": "sha256-kZKThNh1dBSCnISk9vwbqctk1+U0s8Lzasz/CVytJps=",
+        "ref": "master",
+        "rev": "b20e4a108cd890afa6cdf83656856fc2157a8e84",
+        "revCount": 789,
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/helix-editor/helix"
+      },
+      "original": {
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/helix-editor/helix"
+      }
+    },
     "naersk": {
       "inputs": {
         "nixpkgs": "nixpkgs"
@@ -95,6 +113,7 @@
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
+        "helix": "helix",
         "naersk": "naersk",
         "nixpkgs": "nixpkgs_2",
         "rust-overlay": "rust-overlay"

flake.nix

@@ -6,6 +6,12 @@
     flake-utils.url = "github:numtide/flake-utils";
     rust-overlay.url = "github:oxalica/rust-overlay";
     naersk.url = "github:nmattia/naersk";
+    helix = {
+      flake = false;
+      url = "https://github.com/helix-editor/helix";
+      type = "git";
+      submodules = true;
+    };
   };
 
   outputs = inputs@{ self, nixpkgs, naersk, rust-overlay, flake-utils, ... }:
@@ -25,7 +31,7 @@
       in rec {
         packages.helix = naerskLib.buildPackage {
           pname = "helix";
-          root = ./.;
+          root = inputs.helix;
         };
         defaultPackage = packages.helix;
         devShell = pkgs.callPackage ./shell.nix {};