Bug 481880

kde-builder, the replacement for kdesrc-build, depends on python 3.12. Since many distros still do not ship python 3.12 yet, users on these distros need to rely on virtual environments (e.g., see instruction in README).

However, these virtual environments cause conflicts when building packages that depend on python. In particular, the build system (cmake), will try to look for the python dependencies inside the virtual environment.

The current solution is to require the following CMAKE options to be added: "-DPython3_FIND_VIRTUALENV=STANDARD -DPython3_FIND_UNVERSIONED_NAMES=FIRST" to facilitate building these projects. However, this is not ideal since the builder should accommodate the projects it is building, instead of the other way round, forcing projects to accomodate the builder. In addition, adding this CMAKE option globally makes it impossible for build systems to depend on custom virtual environments during build.

The builder should have proper support of virtual environments, or be compatible with older python versions that are available on all popular distros.