No-config debugging: Detected activated environment

[karthiknadig]

The way PATH is setup, python3 and Python have different values in your environment. That is what is breaking this. We use python3 by default . This seems like something is broken in the way environments activated by conda. Those paths must be same.

@eleanorjboyd i cases where we can detect environment activation we should use python as a mitigation.

Originally posted by @karthiknadig in #638