I ran into this problem too. It's annoying, however when I investigated I found the new .pc file name (same as the old one but without "-dev") is more correct and more like that of other projects...
https://git.launchpad.net/~xmir-team/xorg- server/+git/xmir/commit/?id=f0a0fa747226a6a012c4fc79c1d61463d76ff1d2 I don't think ~mir-team is going to, or has any desire to change it back. ** Also affects: mir Importance: Undecided Status: New ** Changed in: mir Status: New => Won't Fix ** Changed in: mir (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1509005 Title: mir-client-platform-mesa-dev pkg-config file dropped Status in Mir: Won't Fix Status in mir package in Ubuntu: Won't Fix Bug description: the mir-client-platform-mesa-dev pkg-config file was dropped in wily, leading to build errors for such optional packages like mesa and xorg- server. Even if you have a feature freeze exception, you shouldn't break existing API's after feature freeze. To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1509005/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

