diff --git a/flake.nix b/flake.nix
index 8dbe962..a549ca1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "The ngrok docker container";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     flake-compat = {
       url = "github:edolstra/flake-compat";
@@ -10,7 +10,13 @@
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }:
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
     let
       pkgs = import nixpkgs {
         system = "x86_64-linux";