Awesome, thank you, that fixed it!
Out of curiosity, is this default-version-pinning behavior documented anywhere or exposed in the UI anywhere? It seems counter-intuitive to pin versions of languages that my build isn’t even directly using… and as far as I can see, the Trusty build image migration guide didn’t mention this either.
That said, I’m relieved the fix was easy and quick. Thank you again for the excellent and prompt support @hillary , I greatly appreciate it!