Resolving dependencies...
Configuring erf-2.0.0.0...
Configuring primitive-0.6.4.0...
Building erf-2.0.0.0...
Building primitive-0.6.4.0...
Installed erf-2.0.0.0
Configuring random-1.1...
Building random-1.1...
Installed random-1.1
Configuring utf8-string-0.3...
Building utf8-string-0.3...
Installed utf8-string-0.3
Installed primitive-0.6.4.0
Configuring tf-random-0.5...
Configuring vector-0.12.0.1...
Building tf-random-0.5...
Building vector-0.12.0.1...
Installed tf-random-0.5
Configuring QuickCheck-2.12.4...
Building QuickCheck-2.12.4...
Installed QuickCheck-2.12.4
Installed vector-0.12.0.1
Configuring morfette-0.4.6...
Building morfette-0.4.6...
Failed to install morfette-0.4.6
Build log ( /home/builder/.cabal/logs/ghc-8.4.3/morfette-0.4.6-IfHJCscwXXF8kjA2kFFFiZ.log ):
cabal: Entering directory '/tmp/cabal-tmp-18931/morfette-0.4.6'
Configuring morfette-0.4.6...
Preprocessing executable 'morfette' for morfette-0.4.6..
Building executable 'morfette' for morfette-0.4.6..
[ 1 of 28] Compiling GramLab.Binomial ( src/GramLab/Binomial.hs, dist/build/morfette/morfette-tmp/GramLab/Binomial.o )
[ 2 of 28] Compiling GramLab.Commands ( src/GramLab/Commands.hs, dist/build/morfette/morfette-tmp/GramLab/Commands.o )

src/GramLab/Commands.hs:50:15: error:
    Ambiguous occurrence ‘<>’
    It could refer to either ‘Prelude.<>’,
                             imported from ‘Prelude’ at src/GramLab/Commands.hs:1:8-23
                             (and originally defined in ‘GHC.Base’)
                          or ‘Text.PrettyPrint.<>’,
                             imported from ‘Text.PrettyPrint’ at src/GramLab/Commands.hs:9:84-87
                             (and originally defined in ‘Text.PrettyPrint.HughesPJ’)
   |
50 |     text name <> text ":"
   |               ^^
cabal: Leaving directory '/tmp/cabal-tmp-18931/morfette-0.4.6'
cabal: Error: some packages failed to install:
morfette-0.4.6-IfHJCscwXXF8kjA2kFFFiZ failed during the building phase. The
exception was:
ExitFailure 1