Have you tried nix-channel --add https://nixos.org/channels/nixos-unstab <https://nixos.org/channels/nixos-unstable>le nixpkgs ? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.science.uu.nl/pipermail/nix-dev/attachments/20160615/7a60b17d/attachment.html>