On Jun 29, 2021, at 8:18 PM, Galaxy Being <borgauf@gmail.com> wrote:

So this is very confusing for a beginner. But happy ending this time. Any lessons I can learn from this? For example, why was this so difficult?

All you needed to do is the following, and nothing else (no directly invoking cabal, etc.):

$ stack ghci --package string-conversions

I tried it just now and it works.

Jeff