[andreasvc]

I think not, I think the problem is that it is a build-time dependency and pip wants to resolve all dependencies before installation begins.

See https://github.com/pypa/pip/issues/1386 (oddly, the issue is closed, while the problem is acknowledged).

[yaph]

I see, thanks for pointing to that issue. The other issue referred https://github.com/pypa/pip/issues/988 is still open, so I guess they work on sorting this out.