Resolving dependencies...
Configuring data-default-class-0.1.2.0...
Configuring dlist-0.8.0.2...
Building data-default-class-0.1.2.0...
Building dlist-0.8.0.2...
Installed data-default-class-0.1.2.0
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Configuring old-locale-1.0.0.7...
Installed dlist-0.8.0.2
Building old-locale-1.0.0.7...
Configuring data-default-instances-containers-0.0.1...
Installed old-locale-1.0.0.7
Building data-default-instances-containers-0.0.1...
Configuring text-1.2.2.1...
Installed data-default-instances-containers-0.0.1
Installed mtl-2.2.1
Configuring data-default-instances-dlist-0.0.1...
Building text-1.2.2.1...
Building data-default-instances-dlist-0.0.1...
Configuring data-default-instances-old-locale-0.0.1...
Installed data-default-instances-dlist-0.0.1
Building data-default-instances-old-locale-0.0.1...
Installed data-default-instances-old-locale-0.0.1
Configuring data-default-0.7.1.1...
Building data-default-0.7.1.1...
Installed data-default-0.7.1.1
Configuring X11-1.7...
Building X11-1.7...
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Installed X11-1.7
Configuring xmobar-0.7...
Failed to install xmobar-0.7
Build log ( /home/builder/.cabal/logs/xmobar-0.7.log ):
cabal: Entering directory '/tmp/cabal-tmp-7414/xmobar-0.7'
cabal: Leaving directory '/tmp/cabal-tmp-7414/xmobar-0.7'
cabal: Error: some packages failed to install:
xmobar-0.7 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-7414/xmobar-0.7/dist/setup/setup.hs:5:3: error:
Failed to load interface for ‘Distribution.Setup’
Perhaps you meant
Distribution.GetOpt
Distribution.Lex
Distribution.ReadE (from Cabal-1.24.0.0)
Use -v to see a list of the files searched for.

/tmp/cabal-tmp-7414/xmobar-0.7/dist/setup/setup.hs:8:3: error:
Failed to load interface for ‘Distribution.Program’
Use -v to see a list of the files searched for.

/tmp/cabal-tmp-7414/xmobar-0.7/dist/setup/setup.hs:9:3: error:
Failed to load interface for ‘Distribution.PreProcess’
Use -v to see a list of the files searched for.
)