diff --git a/nix/default.nix b/nix/default.nix
index 3d11081f76c92c8d4dcba8d06994720c7967e424..a173d234efbebb022fe83dea09ad34884e84b535 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -6,8 +6,8 @@ let
      unstablePckgs = import (builtins.fetchGit {
          # Descriptive name to make the store path easier to identify
          name = "With-RTTI-fix";
-         url = "https://github.com/nixos/nixpkgs-channels/";
-         ref = "refs/heads/nixpkgs-unstable";
+         url = "https://github.com/NixOS/nixpkgs/";
+         ref = "master";
          rev = "0f0b14258be090303c5013c2e29234040fa9766c";
      }) {};
 in