bug#57681: gnome-session and libpcre

[boards2x via Bug reports for GNU Guix]

I'm still seeing this issue with current version of gnome-session in GuixSD. I 
had to remove flatpak and unset XDG_DATA_DIRS which exceeded 1000 chars to be 
able to login again.

https://issues.guix.gnu.org/38309
Thanks