pygmo tries to install stuff in Python install directory

[boegel]

When trying to install pygmo with EasyBuild configured with, it fails with:

-- Install configuration: "Release"
CMake Error at pygmo/plotting/cmake_install.cmake:54 (file):
  file cannot create directory:
  /software/Python/3.9.5-GCCcore-10.3.0/lib/python3.9/site-packages/pygmo/plotting.
  Maybe need administrative privileges.

Note that it's trying to create a directory in $EBROOTPYTHON here, it shouldn't...

cc @Louwrensth

[mboisson]

Mmm, I bet this does not happen if the installation procedure is : build a wheel + install the built wheel scratch that, I just noticed it's not using pip/setup.py

[boegel]

@mboisson It's CMake being stupid, as usual. ;)

[mboisson]

Correction, it's the developers of pygmo doing stupid stuff with CMake