Resolving dependencies...
Configuring hmidi-0.2.0.0...
Building hmidi-0.2.0.0...
Preprocessing library hmidi-0.2.0.0...
[1 of 5] Compiling System.MIDI.Base ( System/MIDI/Base.hs, dist/build/System/MIDI/Base.o )
[2 of 5] Compiling System.MIDI.Placeholder ( System/MIDI/Placeholder.hs, dist/build/System/MIDI/Placeholder.o )
[3 of 5] Compiling System.MIDI      ( System/MIDI.hs, dist/build/System/MIDI.o )
[4 of 5] Compiling System.MIDI.Sync ( System/MIDI/Sync.hs, dist/build/System/MIDI/Sync.o )

System/MIDI/Sync.hs:98:20: Warning: Tab character
[5 of 5] Compiling System.MIDI.Utility ( System/MIDI/Utility.hs, dist/build/System/MIDI/Utility.o )

System/MIDI/Utility.hs:59:10:
    No instance for (MIDIHasName Source)
      arising from a use of ‘selectMidiDevice’
    In a stmt of a 'do' block:
      src <- selectMidiDevice mbdefault srclist
    In the expression:
      do { srclist <- enumerateSources;
           putStrLn "midi sources:";
           src <- selectMidiDevice mbdefault srclist;
           return src }
    In an equation for ‘selectInputDevice’:
        selectInputDevice mbdefault
          = do { srclist <- enumerateSources;
                 putStrLn "midi sources:";
                 src <- selectMidiDevice mbdefault srclist;
                 .... }

System/MIDI/Utility.hs:67:10:
    No instance for (MIDIHasName Destination)
      arising from a use of ‘selectMidiDevice’
    In a stmt of a 'do' block:
      dst <- selectMidiDevice mbdefault dstlist
    In the expression:
      do { dstlist <- enumerateDestinations;
           putStrLn
             "\n\
             \midi destinations:";
           dst <- selectMidiDevice mbdefault dstlist;
           return dst }
    In an equation for ‘selectOutputDevice’:
        selectOutputDevice mbdefault
          = do { dstlist <- enumerateDestinations;
                 putStrLn
                   "\n\
                   \midi destinations:";
                 dst <- selectMidiDevice mbdefault dstlist;
                 .... }
Failed to install hmidi-0.2.0.0
cabal: Error: some packages failed to install:
hmidi-0.2.0.0 failed during the building phase. The exception was:
ExitFailure 1