Timothy Sample <samp...@ngyro.com> writes: > Ricardo Wurmus <rek...@elephly.net> writes: > >> I think that’s a misunderstanding. The cause for the error is earlier >> when it complains that some packages depend on different versions of the >> “transformers” package. “StateT” is a monad transformer. > > For what it’s worth, I fixed this error on my machine by adding > “ghc-transformers” as an input to “ghc-transformers-compat”. (This also > fixed “ghc-adjunctions”.) This suggests to me that what you wrote > earlier accounts for the problem: > >> * many problems are caused by the fact that GHC includes a bunch of >> packages that really shouldn’t be overridden by packages. Examples >> are ghc-directory, ghc-binary, ghc-bytestring, etc. Since we still >> have packages where these inputs are used, there can be conflicts down >> the line, which are hard to fix.
The solution might be to remove ghc-transformers from all packages that currently have it as an input rather than add it wherever the transformers is required. This seems to be only ghc-mtl. I’ve removed it and am building ghc-mtl and ghc-resourcet now. -- Ricardo GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC https://elephly.net
