Resolving dependencies...
Configuring utf8-string-0.3.7...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building utf8-string-0.3.7...
Installed utf8-string-0.3.7
Configuring glib-0.12.5.4...
Failed to install glib-0.12.5.4
Build log ( /home/builder/.cabal/logs/glib-0.12.5.4.log ):
cabal: Entering directory '/tmp/cabal-tmp-29327/glib-0.12.5.4'
cabal: Leaving directory '/tmp/cabal-tmp-29327/glib-0.12.5.4'
Installed mtl-2.2.1
cabal: Error: some packages failed to install:
gio-0.12.1 depends on glib-0.12.5.4 which failed to install.
glib-0.12.5.4 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:60:49: error:
Ambiguous occurrence ‘exeExtension’
It could refer to either ‘Distribution.Simple.BuildPaths.exeExtension’,
imported from ‘Distribution.Simple.BuildPaths’ at
/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:11:40-51
or ‘System.Directory.exeExtension’,
imported from ‘System.Directory’ at
/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:23:1-23
(and originally defined in
‘directory-1.2.6.2:System.Directory.Internal.Config’)

/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:91:17: error:
Ambiguous occurrence ‘die’
It could refer to either ‘Distribution.Simple.Utils.die’,
imported from ‘Distribution.Simple.Utils’ at
/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:8:1-32
or ‘System.Exit.die’,
imported from ‘System.Exit’ at
/tmp/cabal-tmp-29327/glib-0.12.5.4/SetupWrapper.hs:21:1-18
)