Resolving dependencies...
Configuring mtl-2.2.1...
Configuring text-1.2.2.1...
Building mtl-2.2.1...
Building text-1.2.2.1...
Installed mtl-2.2.1
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring fltkhs-0.5.1.5...
Failed to install fltkhs-0.5.1.5
Build log ( /home/builder/.cabal/logs/fltkhs-0.5.1.5.log ):
cabal: Entering directory '/tmp/cabal-tmp-28778/fltkhs-0.5.1.5'
cabal: Leaving directory '/tmp/cabal-tmp-28778/fltkhs-0.5.1.5'
cabal: Error: some packages failed to install:
fltkhs-0.5.1.5 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-28778/fltkhs-0.5.1.5/dist/setup/setup.hs:36:100: error:
Module
‘Distribution.InstalledPackageInfo’
does not export
‘libraryDynDirs’
)