bug#38795: "guix build" doesn't find modules from extra channels when building from an expression

[pkill9]

Hi Gábor,

> This is a possible duplicate of 37399. Can you confirm?

Is this the bug? https://debbugs.gnu.org/cgi/bugreport.cgi?bug=37399

If so, yes, it looks like it is caused by the same issue, as when I set
GUILE_LOAD_PATH to point to my repository, it finds the module.

Thanks