Hi Neal, > I installed cabal with apt install cabal-install other than that there > are no other cabal packages installed
so you have the debian packes ghc, libghc-cabal-dev, and cabal-install all from the official debian package repository, and no haskell at all installed via cabal? That should actually work on jessie. But please double check that there are no left-overs from previous cabal installations, as those versions might not fit with the versions used in the debian respository. Thanks, Klaus -- Klaus Aehlig Google Germany GmbH, Erika-Mann-Str. 33, 80636 Muenchen Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg Geschaeftsfuehrer: Matthew Scott Sucherman, Paul Terence Manicle
