Im trying to install a custom package for my project using pip install. The project is using setuptools to create a .whl file.

When trying to install pip like below command, Im getting error: Invalid requirement.

pip install target/custom_utils-2.0.0_SNAPSHOT-py3-none-any.whl

error:

ERROR: Invalid requirement: 'custom_utils==2.0.0_SNAPSHOT': Expected end or semicolon (after version specifier)
    custom_utils==2.0.0_SNAPSHOT
                ~~~~~~~^

This version is violating PEP 440, but setuptool==65.5.1 was still able to handle this. The strange part is, this was working till yesterday. Im not sure if there’s something changed during night.