"Can't get version info"

[nottrobin]

Trying pyflow for the first time, I'm getting this right away on our ubuntu.com project (trying pyflow install or pyflow switch or just pyflow bare):

$ pyflow switch 3.10
Switched to Python version 3.10
Found multiple compatible Python versions. Please enter the number associated with the one you'd like to use:
1: python3.10: 3.10.6
2: python3: 3.10.6
1
🐍 Setting up Python...
Can't get version info for the dependency `canonicalwebteam`. Is it spelled correctly? Is the internet connection ok?

I can't quite tell where this error is coming from. But I (we) wrote the canonicalwebteam set of packages. They install and work fine with pip, but I can well believe we've done something unconventional in the setup. Could you give me a pointer as to how to get past this?