Hi there, I’m just moving over a discussion (linked below) from Discord per @neenjaw 's suggestion.
Basically, the regex-pcre library isn’t available to the test runner (the hypothesis being that package isn’t included in the runner’s underlying image) – this causes errors like:
Now, I’m not sure it’s in the spirit of the Haskell learning track to include this package since it could be a “crutch,” functionality that is relied upon and precludes learning how to actually write Haskell code to perform the given task (like I’ve done in the above exercise 
), but that probably warrants a more philosophical (if not pedagogical) exchange!
{ X-link to the Discord discussion }