* Jack: > It seems that flask-migrate was recently upgraded from 3.0.0 to 3.0.1, > but it's DEPEND for flask was changed from >=flask-0.9 to <flask-2.
According to the commit history this was done because of failing flask-migrate tests; see [1]. Did you build with USE=test after reverting the dependency change? [1] https://bugs.gentoo.org/801670 -Ralph