Nixhub.io | Search Historical Versions of Nix Packages

awesome website.
I wonder if you envisioned searching a version of package that satisfies constraints on its buildInputs ?
Right now I am trying to create a python environment with spacy and tensorflow but they use different versions of protobuf, with spacy depending on a neweer protobuf. which creates a collision. A tool that could list nixpkgs versions of spacy that depends upon the older protobuf version X would be helpful in this situation .

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