Am 28.04.20 um 15:38 schrieb Dominik Schrempf:
Maybe I should have been more specific. I can compile the package with `stack build`, but never built with cabal directly.
My cabal versions are: + cabal --version cabal-install version 3.0.0.0 compiled using version 3.0.1.0 of the Cabal library
The command I use is cabal build or cabal haddock --haddock-for-hackage --haddock-hyperlink-source
v2-build and new-build fail with the error I posted below.
By default cabal uses the ghc that it finds in your PATH. My guess is that this is a different version than that in your stack setup, which means cabal may select some older or newer dependencies as a result. If you have the same ghc, you could look at the versions of the libraries that cabal selects and that give you trouble. Compare them to what your working stack setup uses and adapt the version bounds accordingly in your cabal file. Or perhaps stack can be convinced to write a cabal file that freezes the versions to exactly the set supported by that setup? Cheers Ben