I forgot to say that adding ‘noCheck = true;’ doesn’t seem to work. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 835 bytes Desc: not available Url : http://lists.science.uu.nl/pipermail/nix-dev/attachments/20150107/6193113e/attachment-0001.bin