Call the package.py script with WRKSRC as the CWD. This removes the need for patching sysconfig.py and package.py (PyPy3) because files that are created by the scripts in the CWD now are created in WRKSRC. This is also consistent with other build stept, where an explicit change of the CWD to WRKSRC is done.

syntax: regexp

^work[^/]*/