Even using conda to manage reqs is an absolute nightmare. Did a subreq get updated? Did the author of the library pin that subreq? No? Have fun hunting down which library needs to be downgraded manually
I used a couple of tricks to solve this. First, make cond env export a build step and environment.yml an artifact so you've got a nice summary of what got installed. Second, nightly builds so you aren't surprised by random package upgrade errors the next time you commit code to your project.
