The only requirement is a spack working instance. In particular $SPACK_ROOT/bin/spack-python has to be in the PATH.
Script for generating spack configuration files, i.e. packages.yaml and compilers.yaml, for all
the CDTs/CPEs available on the system on which the script is executed.
Modulefile template that checks if a CDT/CPE module is loaded and sets the environment variable
SPACK_SYSTEM_CONFIG_PATH accordingly (more info here spack/spack#26735).
This instructs the (modern enough) spack instance to use generated configuration files giving access
to Cray provided system packages and compilers for the programming environment used.
Before using it by adding it to MODULEPATH, it should be edited so that SPACK_CSCS_CONFIGS_ROOT points
to the root of spack configuration folders for cdt/cpe generated by spack-allinone.py.