Hello,
This looks like a problem with pip not being able to figure out how to install zfit without having a conflict with what’s on the LCG release.
We are now working to offer the user the possibility to define her own environments in SWAN (e.g. conda), but this is not yet in production.
At this moment, you could try:
- Starting your session with a different LCG release (e.g. 98 instead of 99) and trying the command again. Perhaps the package versions on that release allow you to successfully install.
- These are some instructions on how to setup a conda environment right now in SWAN, contributed by a user: Installing custom Jupyter kernels at SWAN startup . But this is still a hack, since we want to provide an integrated solution in SWAN as I explained above.