Resolving dependencies...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Installed mtl-2.2.1
Configuring cairo-0.12.1...
Failed to install cairo-0.12.1
Build log ( /home/builder/.cabal/logs/cairo-0.12.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-29817/cairo-0.12.1'
cabal: Leaving directory '/tmp/cabal-tmp-29817/cairo-0.12.1'
cabal: Error: some packages failed to install:
cairo-0.12.1 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:42:49: error:
Ambiguous occurrence ‘exeExtension’
It could refer to either ‘Distribution.Simple.BuildPaths.exeExtension’,
imported from ‘Distribution.Simple.BuildPaths’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:11:40-51
or ‘System.Directory.exeExtension’,
imported from ‘System.Directory’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:23:1-23
(and originally defined in
‘directory-1.2.6.2:System.Directory.Internal.Config’)

/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:73:17: error:
Ambiguous occurrence ‘die’
It could refer to either ‘Distribution.Simple.Utils.die’,
imported from ‘Distribution.Simple.Utils’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:8:1-32
or ‘System.Exit.die’,
imported from ‘System.Exit’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:21:1-18

/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:94:45: error:
Ambiguous occurrence ‘moreRecentFile’
It could refer to either ‘Distribution.Simple.Utils.moreRecentFile’,
imported from ‘Distribution.Simple.Utils’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:8:1-32
or ‘SetupWrapper.moreRecentFile’,
defined at /tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:149:1

/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:95:45: error:
Ambiguous occurrence ‘moreRecentFile’
It could refer to either ‘Distribution.Simple.Utils.moreRecentFile’,
imported from ‘Distribution.Simple.Utils’ at
/tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:8:1-32
or ‘SetupWrapper.moreRecentFile’,
defined at /tmp/cabal-tmp-29817/cairo-0.12.1/SetupWrapper.hs:149:1
)