[14:11:32] <ngoldbaum> for me this came from black using pyproject.toml for configuration which at some point caused my build to stop working
[14:11:46] <ngoldbaum> let me see if i can find the issue in one of the pypa repos...
[14:13:30] <ngoldbaum> the existence of pyproject.toml turns on build isolation, which removes the root of the project from sys.path (among other things)
[14:13:35] <ngoldbaum> lots of tools relied on that
[14:13:47] <ngoldbaum> (perhaps those tools were broken, still, they worked for a long time)
[14:14:00] <agronholm> that does sound like bad design