Hi,
I could be interpreting this wrongly, but it looks from eg https://hydra.nixos.org/jobset/gnu/emacs-trunk#tabs-configuration that most GNU jobs are stuck on nixpkgs version 14.12? (The sole exception from https://hydra.nixos.org/project/gnu#tabs-project seems to be coreutils, tracking nixpkgs master.) Is there someone here who can update "14.12" to a recent release?
