Your bug report #25242: Cannot build source derivations with a custom TMPDIR which was filed against the guix package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 25242@debbugs.gnu.org. -- 25242: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=25242 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems