Comment #9 on issue 411 by allbery.b: Only one desktop spread over displays instead of two separate with Nvidia Twinview http://code.google.com/p/xmonad/issues/detail?id=411 That would require Portage to scan every user's home directory for .xmonad/xmonad.hs and then switch to that user to recompile for them (or maybe just "touch" it so it is rebuilt on next xmonad start); I'd imagine nobody wants to deal with the rat's nest *that* involves. (Let's just say that adopting a policy of "packages can scan users' home dirs" has all sorts of ugly privacy implications, the main cure for which involves the package manager providing specific support for that itself so it can make sure the scan is done with reduced privileges *and* minimize the chances of data leakage... the latter of which is difficult at the best of times.)