Resolving dependencies...
Downloading HROOT-0.5.0.0...
Configuring HROOT-0.5.0.0...
Failed to install HROOT-0.5.0.0
Build log ( /home/builder/.cabal/logs/HROOT-0.5.0.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-22836/HROOT-0.5.0.0'
cabal: Leaving directory '/tmp/cabal-tmp-22836/HROOT-0.5.0.0'
cabal: Error: some packages failed to install:
HROOT-0.5.0.0 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-22836/HROOT-0.5.0.0/dist/setup/setup.hs:8:3: error:
Failed to load interface for ‘Config’
It is a member of the hidden package ‘ghc-8.0.1.20161018’.
Use -v to see a list of the files searched for.
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