Create a mechanism to specify the environment in the config

It would be useful to specify in the configuration which environment is required for the analysis. There is an issue of a subtle dependency on the run-time environment. I can see two options

1. If the run-time and target environment do not match, error out
2. If the run-time and target environment do not match, print a warning

I think I prefer option 1 as I don't see a usecase for 2. But opinions are welcome