PyQt-builder is the PEP 517 compliant build system for PyQt and projects that
extend PyQt. It extends the sip build system and uses Qt’s qmake to perform the
actual compilation and installation of extension modules.

Projects that use PyQt-builder provide an appropriate pyproject.toml file and an
optional project.py script. Any PEP 517 compliant frontend, for example
sip-install or pip can then be used to build and install the project.