Resolving dependencies...
Downloading zmidi-core-0.8.0...
Configuring zmidi-core-0.8.0...
Building zmidi-core-0.8.0...
Preprocessing library zmidi-core-0.8.0...
[ 1 of 14] Compiling ZMidi.Core.Internal.ParserMonad ( src/ZMidi/Core/Internal/ParserMonad.hs, dist/build/ZMidi/Core/Internal/ParserMonad.o )
[ 2 of 14] Compiling ZMidi.Core.Internal.ExtraTypes ( src/ZMidi/Core/Internal/ExtraTypes.hs, dist/build/ZMidi/Core/Internal/ExtraTypes.o )
[ 3 of 14] Compiling ZMidi.Core.Internal.SimpleFormat ( src/ZMidi/Core/Internal/SimpleFormat.hs, dist/build/ZMidi/Core/Internal/SimpleFormat.o )
[ 4 of 14] Compiling ZMidi.Core.VersionNumber ( src/ZMidi/Core/VersionNumber.hs, dist/build/ZMidi/Core/VersionNumber.o )
[ 5 of 14] Compiling ZMidi.Core.Datatypes ( src/ZMidi/Core/Datatypes.hs, dist/build/ZMidi/Core/Datatypes.o )
[ 6 of 14] Compiling ZMidi.Core.ReadFile ( src/ZMidi/Core/ReadFile.hs, dist/build/ZMidi/Core/ReadFile.o )
[ 7 of 14] Compiling ZMidi.Core.WriteFile ( src/ZMidi/Core/WriteFile.hs, dist/build/ZMidi/Core/WriteFile.o )
[ 8 of 14] Compiling ZMidi.Core.Pretty.Internal ( src/ZMidi/Core/Pretty/Internal.hs, dist/build/ZMidi/Core/Pretty/Internal.o )
[ 9 of 14] Compiling ZMidi.Core.Pretty.Csv ( src/ZMidi/Core/Pretty/Csv.hs, dist/build/ZMidi/Core/Pretty/Csv.o )
[10 of 14] Compiling ZMidi.Core.Pretty.Interp ( src/ZMidi/Core/Pretty/Interp.hs, dist/build/ZMidi/Core/Pretty/Interp.o )
[11 of 14] Compiling ZMidi.Core.Pretty ( src/ZMidi/Core/Pretty.hs, dist/build/ZMidi/Core/Pretty.o )

src/ZMidi/Core/Pretty.hs:255:45: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:256:45: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:257:45: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:258:45: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:264:43: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:274:42: Not in scope: ‘mempty’

src/ZMidi/Core/Pretty.hs:276:42:
    Not in scope: ‘mconcat’
    Perhaps you meant ‘concat’ (imported from Prelude)
Failed to install zmidi-core-0.8.0
cabal: Error: some packages failed to install:
zmidi-core-0.8.0 failed during the building phase. The exception was:
ExitFailure 1