Hello Chris,
> If you try to build Guile 3 without substitutes using any recent version > of Guix, it can frequently fail. I had to try about 12 times > in a row before it succeeded. The failure simply said "FAIL: > check-guile" - I didn't save the build logs, which were lost once the > build succeeded. If anyone is interested in debugging, it should be > easy to reproduce. Just do this: I investigated those failures yesterday. I think they are caused by: https://lists.gnu.org/archive/html/bug-guile/2020-09/msg00012.html. Let's see if the fix proposed by Rob can be merged in Guile. Thanks, Mathieu