Created attachment 175858 [details]
The current alembic port has a strict dependency on sqlalchemy 0.7 branch that is in EOL. It causes package conflicts when you define both alembic and sqlalchemy dependencies in RUN_DEPENDS.
I suggest to change sqlalchemy07 to sqlalchemy10 in the Makefile as a temporary solution.
This patch doesn't affect other ports.
or maybe it'd better to remove sqlalchemy dependency (topic to discuss)
Thanks for the information, I'll update it to 0.8.8 and change RUN_DEPENDS to py-sqlalchemy10.
A commit references this bug:
Date: Tue Oct 18 06:13:26 UTC 2016
New revision: 424148
- Update to 0.8.8
- Change RUN_DEPENDS to py-sqlalchemy10 
PR: 213562 
Submitted by: Alexander Nusov <firstname.lastname@example.org>