Hi Tomás, I'm not certain what your problem is, but I've run into problems with XDG_DATA_DIRS in the past, and I've added these lines in my profile script *before* sourcing any Guix profiles: # XDG_DATA_DIRS often starts off empty, but an empty value is # interpreted as this value. Loading a profile can set it, though, # which effectively ignores the default value. We want it to # instead add to the default, so we set it here to the default # value. if [ -z "$XDG_DATA_DIRS" ]; then export XDG_DATA_DIRS="/usr/local/share/:/usr/share/" fi I see you have this line in your profile script: > export > XDG_DATA_DIRS="$GUIX_PROFILE/share:${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/}" but you call this *after* sourcing the Guix profiles, which means if Guix sets XDG_DATA_DIRS then the fallback case (i.e. including /usr/local/share and /usr/share) won't have any effect, and the default paths (which Ubuntu expects) won't end up in the path. I'm not as familiar with GI_TYPELIB_PATH, but I think it might need something similar with a default value of /usr/lib/girepository-1.0 (that's mostly a guess, based on a quick search of the internet and my local Ubuntu machine). I hope that helps! Carlo