A dummy (maybe) suggestion. Meta package gnome-light contains the Yelp help browser, that pulls among other dependencies xulrunner. Since it takes a long time to compile, and GNOME users on old PCs could avoid to build this (and surely among them there are some who doesn't want to build xulrunner), couldn't be useful to set yelp as a USE flag? Reproducible: Always
Duplicate of #340265, see also #107636 and #23909. *** This bug has been marked as a duplicate of bug 340265 ***