The dataset importer introduced a couple months ago has two issues:

1. https://github.com/mozilla/firefox-translations-training/blob/main/Snakefile#L281 calls it using bash, not python (then the errors are related to bash not recognizing "import" etc)
2. ValueError: Invalid dataset name: custom-corpus_/corpora/parallel/test/all. Use the following format: <importer>_<name> or <importer>_<augmentation>_<name>. This is because the regex checked doesn't allow for dashes. The correct regex is ^([\w-]*)_(aug[a-z\-]*)?_?(.+)$

(with these two fixes, the pipeline continues)