diff --git a/configuration.nix b/configuration.nix
index 35d921d..f84f85b 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -5,7 +5,7 @@
 { config, pkgs, ... }:
 
 let
-  unstable = import <nixpkgs-unstable> { config = { allowUnfree = true; }; };
+  unstable = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixpkgs-unstable.tar.gz") { config = { allowUnfree = true; }; };
 in
 
 {