Hi there, i'm on ArchLinux as well. as far as i can tell, the problem with boost-python is just Python3 getting in the way with its python-config. (since for Python2 one should use python2-config, as least on ArchLinux) Moreover in runtime, the GUI construction fails as follows for me: all calls to menuManager.insert return zero pointers in void MRU::constructMenu() (defined in radiant/ui/mru/MRU.cpp), which probably indicates a missing resource or a wrong resource identification... ? how can i debug this in more details? Regards, Alex ps: i also got a similar log with the following (after i tried to fix the above issue by just ignoring zero pointers):