Tracker for packages that are still using legacy build mode, sigh.
[Adding this comment en-masse, sorry for the noise, but it's important.] 1. Please take particular care to check file diffs before/after, possibly using `iwdevtools`. Keep a particular eye out for e.g. config files now missing from /etc and instead being in /usr/lib/python*/site-packages, etc. 2. Please make sure to do the migration in a new revision in ~arch, partly because of 1.
Final ping. Please note that we will not hesitate to last rite low profile packages over this.