Resolving dependencies...
Downloading jack-0.5...
Configuring jack-0.5...
Failed to install jack-0.5
Build log ( /home/builder/.cabal/logs/jack-0.5.log ):
cabal: Entering directory '/tmp/cabal-tmp-32427/jack-0.5'
cabal: Leaving directory '/tmp/cabal-tmp-32427/jack-0.5'
cabal: Error: some packages failed to install:
jack-0.5 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-32427/jack-0.5/dist/setup/setup.hs:4:1: error:
Failed to load interface for ‘Directory’
Use -v to see a list of the files searched for.

/tmp/cabal-tmp-32427/jack-0.5/dist/setup/setup.hs:5:1: error:
Failed to load interface for ‘Monad’
Use -v to see a list of the files searched for.

/tmp/cabal-tmp-32427/jack-0.5/dist/setup/setup.hs:6:1: error:
Failed to load interface for ‘System’
Use -v to see a list of the files searched for.
)