checkInputs used to be added to nativeBuildInputs. Now we have nativeCheckInputs to do that instead. Doing this treewide change allows to keep hashes identical to before the introduction of nativeCheckInputs.
Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools. This update was made based on information from https://repology.org/metapackage/python3.7-fastcache/versions