build_runner VS code extension exits with code 66

[lucavenir]

Hi there,

I am unable to make this extension work on VS code. I'm not sure what I am missing. Yes, I've read through this readme and and I've read build_runner docs.

I am perfectly able to run build_runner in my project via the command line. At the root of the project, I simply write:

flutter pub run build_runner watch -d

And tadah! Everything works fine.

But as I try to do the same with the extension, either by using the shortcut (CMD+B) or by just clicking watch on the bottom bar, I receive this output:

Spawning `flutter pub run build_runner watch --delete-conflicting-outputs` in `[absolute-path-of-my-file-system]/[my-project-folder]`

Command exited with code 66

And that's it! Nothing works from there.
What am I missing?