Stack has not been tested with GHC & Cabal versions

15
votes

In my Haskell project when I stack run, it is showing the following, but still runs. What warning is this? How can I get rid of it?

Stack has not been tested with GHC versions above 8.6, and using 8.8.2, this may fail
Stack has not been tested with Cabal versions above 2.4, but version 3.0.1.0 was found, this may fail
3
haskellcabalhaskell-stack
This is just a compatibility warning. The next stack version should be tested with GHC 8.8 and this warning should be gone. Until then there's probably little you can do unless you want to modify the source. - sjakobi

3 Answers

5
votes

This is just a compatibility warning. The next stack version should be tested with GHC 8.8 and this warning should be gone. Until then there's probably little you can do unless you want to modify the source.

3
votes

As the others said, this can be most likely be ignored. If you want to be on the super-safe side, edit your stack.yaml and downgrade the resolver back to 14.x (latest at this point is 14.27).

0
votes

You can specify a resolver when creating a project to get rid of this warning:

stack new hello-world simple --resolver=lts-14.27