Say I have

requirements.in:

Django~=1.8.0

And also

requirements-dev.in:

django-debug-toolbar

How can I run pip-compile on requirements-dev.in, where it will also take into account the requirements in requirements.in when figuring out which versions to use?

For now I have an ad-hoc script that compiles requirements.in first, then requirements-dev.in has -r requirements.txt as its first line. Is this an okay workflow? I'm worried that in the future if I add a dependency it will try and update a bunch of stuff I don't want it to update, but I haven't actually used this tool long enough to determine whether that's truly a problem. Wondering if anyone else has used pip-tools in this fashion and has any advice?