freeze minimum packages version

What's the problem this feature will solve?

Let's say I'm maintaining a library, and that library supports a range of underlying dependencies, not just the most recent version. We want to test against some of those earlier versions.

We can specify this as a version inequality, like depX >= 1.0.

Describe the solution you'd like

Something like pip-compile --minimum or pip-compile --lowest. This would produce a file with depX == 1.0.

Alternative Solutions

This can be done by hand, but it involves duplicating the minimum versions all over the place.

Additional context