Hello, I think there is a wrong store path in hydra blocking some builds. For example: http://hydra.nixos.org/build/339345 The concerning file /nix/store/w4lvvk43b8gq6rw6nbjvi7csw2ib7vdp-libgnomeui-2.24.2.tar.bz2 works in my computer. Regards, Lluís.