[arch-general] Possible to rebuild a standard package?

[Peter Nabbefeld via arch-general]

Hello,

I'd like to re-build (not just re-install) pyside2 and python-shiboken2
locally. As PKGBUILD (at least for shiboken2) contains cmake
instructions, I'd guess this should be easy, but I cannot figure out, how.

Kind regards,
Peter