`python -m pip install -e .` builds `release` instead of `debug`

[lycantropos]

I've started to get issues in CI, after debugging I can say that this commit
925b3ba
introduces changes that breaks previous behavior:
after running

> python -m pip install -e .

previously target/debug build was created and after that commit it started creating target/release instead, is it expected?

[davidhewitt]

Very sorry about that. I've prepared #460, can you maybe check if that fixes the problem?

If you don't have a chance to check, no problem, I'll push later when I get a chance.

[lycantropos]

yes, it does, looks great

[davidhewitt]

Thanks for confirming!