Multiple py-backports packages include a site-packages/backports/ init.py file, thus causing a failure when trying to activate multiple py-backports packages. $ ./bin/spack activate ...
In the file "models/init.py", line 5 attempts to import "bicausal" from "exp.BiCausal_strategy2": However, there is no file or module named "BiCausal_strategy2" in the project. Please help.