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Watch the live stream: Watch on YouTube About the show Sponsored by the IRL Podcast from Mozilla Brian #1: Pip constraints files by luminousmen You can put some constraints on your dependencies with a constraints file. “Constraints files are requirements files that only control which version of a requirement is installed, not whether it is installed or not. “ Syntax is a subset of requirements.txt syntax but all the restrictions seem reasonable, considering must have a name can’t be editable can’t specify extras (that one is maybe slightly weird) You can put --constraint constraints.txt right at the top of your requirements.txt file or specify it on command line, pip install --constraint constraints.txt -r requirements.txt Or, my favorite, stick it at the top of requirements.in file. yes. pip-compile correctly handles constraints when generating requirements.txt. Example requirements.in --constraint constraints.txt typer constraints.txt click<8.1.3 Output from pip-compile requirements.in #