product-profunctors VS funflow

If you're really interested in solving it then you could download the git repo, run cabal build, see if you get the same error, and if so progressively remove parts of the package (by commenting them out in the source files) until you get something to compile. That way you may be able to pinpoint the exact problem.

I use it in test suites, where the tests are simply to check that something compiles, not its behaviour, for example https://github.com/tomjaguarpaw/product-profunctors/blob/faf...

I had also thought that there was a reason one could need that pattern to import instances even in the absence of orphans, but on reflection I think I was mistaken.

Here is link number 1 - Previous text "PR"

funflow is a cool library for writing "workflows", but basically it's a library that implements caching. So if you have a process that reads a file A, does transformation A → B, then does B → C, then C → D, then writes D to disk, each step of that will be cached to disk and you won't need to redo the A → B step if your program crashes during the B → C step.

You might wanna check out funflow

Funflow: https://github.com/tweag/funflow