 qttools built fine a couple of days ago but FTBFS today 😢
 in debian I presume? (re @mitya57: qttools built fine a couple of days ago but FTBFS today 😢)
 Yes, fine
 Probably a result of https://launchpad.net/ubuntu/+source/llvm-defaults/0.55.1ubuntu1, I will build qttools with -proposed pocket disabled