Resolving dependencies...
Configuring Boolean-0.2.3...
Configuring NumInstances-1.4...
Building NumInstances-1.4...
Building Boolean-0.2.3...
Installed Boolean-0.2.3
Configuring applicative-numbers-0.1.3...
Building applicative-numbers-0.1.3...
Configuring data-default-class-0.1.2.0...
Installed NumInstances-1.4
Building data-default-class-0.1.2.0...
Configuring dlist-0.8.0.2...
Installed applicative-numbers-0.1.3
Building dlist-0.8.0.2...
Configuring fail-4.9.0.0...
Installed data-default-class-0.1.2.0
Building fail-4.9.0.0...
Configuring base-orphans-0.5.4...
Installed fail-4.9.0.0
Building base-orphans-0.5.4...
Configuring mtl-2.2.1...
Installed dlist-0.8.0.2
Configuring newtype-0.2...
Installed base-orphans-0.5.4
Building mtl-2.2.1...
Building newtype-0.2...
Configuring newtype-generics-0.5...
Installed newtype-0.2
Building newtype-generics-0.5...
Configuring nats-1.1.1...
Installed newtype-generics-0.5
Building nats-1.1.1...
Configuring old-locale-1.0.0.7...
Installed mtl-2.2.1
Configuring primitive-0.6.1.0...
Installed nats-1.1.1
Building old-locale-1.0.0.7...
Building primitive-0.6.1.0...
Configuring parallel-3.2.1.0...
Installed old-locale-1.0.0.7
Building parallel-3.2.1.0...
Configuring prelude-extras-0.4.0.3...
Installed parallel-3.2.1.0
Building prelude-extras-0.4.0.3...
Configuring random-1.1...
Installed primitive-0.6.1.0
Building random-1.1...
Configuring reverse-apply-2.0.1...
Installed random-1.1
Configuring reflection-2.1.2...
Installed prelude-extras-0.4.0.3
Building reverse-apply-2.0.1...
Building reflection-2.1.2...
Configuring semigroups-0.18.2...
Installed reverse-apply-2.0.1
Building semigroups-0.18.2...
Configuring stm-2.4.4.1...
Installed semigroups-0.18.2
Building stm-2.4.4.1...
Configuring syb-0.6...
Installed reflection-2.1.2
Building syb-0.6...
Configuring ty-0.1.7...
Installed stm-2.4.4.1
Building ty-0.1.7...
Configuring universe-base-1.0.2.1...
Installed ty-0.1.7
Building universe-base-1.0.2.1...
Configuring transformers-compat-0.5.1.4...
Installed syb-0.6
Configuring text-1.2.2.1...
Installed universe-base-1.0.2.1
Building transformers-compat-0.5.1.4...
Building text-1.2.2.1...
Installed transformers-compat-0.5.1.4
Configuring data-default-instances-containers-0.0.1...
Building data-default-instances-containers-0.0.1...
Configuring data-default-instances-dlist-0.0.1...
Installed data-default-instances-containers-0.0.1
Building data-default-instances-dlist-0.0.1...
Configuring MemoTrie-0.6.7...
Installed data-default-instances-dlist-0.0.1
Building MemoTrie-0.6.7...
Configuring data-default-instances-old-locale-0.0.1...
Installed MemoTrie-0.6.7
Building data-default-instances-old-locale-0.0.1...
Installed data-default-instances-old-locale-0.0.1
Configuring tf-random-0.5...
Building tf-random-0.5...
Configuring music-dynamics-literal-1.9.0...
Installed tf-random-0.5
Building music-dynamics-literal-1.9.0...
Configuring vector-0.11.0.0...
Installed music-dynamics-literal-1.9.0
Configuring music-pitch-literal-1.9.0...
Installed text-1.2.2.1
Building vector-0.11.0.0...
Building music-pitch-literal-1.9.0...
Configuring StateVar-1.1.0.4...
Installed music-pitch-literal-1.9.0
Building StateVar-1.1.0.4...
Configuring universe-instances-base-1.0...
Installed StateVar-1.1.0.4
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Configuring positive-0.4.1...
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Configuring exceptions-0.8.3...
Installed positive-0.4.1
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Configuring tagged-0.8.5...
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Configuring vector-space-0.10.4...
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Configuring data-default-0.7.1.1...
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Configuring hashable-1.2.4.0...
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Configuring QuickCheck-2.9.2...
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Building QuickCheck-2.9.2...
Configuring parsec-3.1.11...
Installed hashable-1.2.4.0
Building parsec-3.1.11...
Configuring xml-1.3.14...
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Configuring distributive-0.5.0.2...
Installed QuickCheck-2.9.2
Configuring average-0.6.1...
Building average-0.6.1...
Configuring vector-space-points-0.2.1.2...
Installed average-0.6.1
Building distributive-0.5.0.2...
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Configuring extended-reals-0.2.2.0...
Installed distributive-0.5.0.2
Configuring scientific-0.3.4.9...
Installed vector-space-points-0.2.1.2
Building extended-reals-0.2.2.0...
Building scientific-0.3.4.9...
Configuring constraints-0.8...
Installed extended-reals-0.2.2.0
Building constraints-0.8...
Configuring unordered-containers-0.2.7.1...
Installed scientific-0.3.4.9
Building unordered-containers-0.2.7.1...
Configuring void-0.7.1...
Installed constraints-0.8
Building void-0.7.1...
Configuring HCodecs-0.5...
Installed void-0.7.1
Building HCodecs-0.5...
Installed unordered-containers-0.2.7.1
Configuring music-dynamics-1.9.0...
Building music-dynamics-1.9.0...
Installed music-dynamics-1.9.0
Configuring type-unary-0.3.0...
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Configuring attoparsec-0.13.1.0...
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Configuring contravariant-1.4...
Installed type-unary-0.3.0
Building attoparsec-0.13.1.0...
Building contravariant-1.4...
Configuring lattices-1.5.0...
Installed contravariant-1.4
Building lattices-1.5.0...
Installed attoparsec-0.13.1.0
Configuring hamid-0.10...
Building hamid-0.10...
Installed hamid-0.10
Configuring comonad-5...
Configuring musicxml2-1.9.0...
Installed lattices-1.5.0
Building musicxml2-1.9.0...
Building comonad-5...
Configuring aeson-0.11.2.1...
Installed musicxml2-1.9.0
Configuring reenact-0.9...
Installed comonad-5
Building aeson-0.11.2.1...
Building reenact-0.9...
Configuring data-interval-1.2.0...
Installed reenact-0.9
Building data-interval-1.2.0...
Installed data-interval-1.2.0
Configuring bifunctors-5.4.1...
Building bifunctors-5.4.1...
Installed aeson-0.11.2.1
Installed bifunctors-5.4.1
Configuring semigroupoids-5.1...
Configuring profunctors-5.2...
Building profunctors-5.2...
Building semigroupoids-5.1...
Installed profunctors-5.2
Installed semigroupoids-5.1
Configuring free-4.12.4...
Configuring music-score-1.2.2...
Building music-score-1.2.2...
Building free-4.12.4...
Failed to install music-score-1.2.2
Build log ( /home/builder/.cabal/logs/music-score-1.2.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-27034/music-score-1.2.2'
Configuring music-score-1.2.2...
Building music-score-1.2.2...
Preprocessing library music-score-1.2.2...
[ 1 of 14] Compiling Music.Score.Duration ( src/Music/Score/Duration.hs, dist/build/Music/Score/Duration.o )
[ 2 of 14] Compiling Music.Score.Time ( src/Music/Score/Time.hs, dist/build/Music/Score/Time.o )
[ 3 of 14] Compiling Music.Score.Part ( src/Music/Score/Part.hs, dist/build/Music/Score/Part.o )
[ 4 of 14] Compiling Music.Score.Score ( src/Music/Score/Score.hs, dist/build/Music/Score/Score.o )
[ 5 of 14] Compiling Music.Score.Ties ( src/Music/Score/Ties.hs, dist/build/Music/Score/Ties.o )
[ 6 of 14] Compiling Music.Score.Pitch ( src/Music/Score/Pitch.hs, dist/build/Music/Score/Pitch.o )
[ 7 of 14] Compiling Music.Score.Rhythm ( src/Music/Score/Rhythm.hs, dist/build/Music/Score/Rhythm.o )
[ 8 of 14] Compiling Music.Score.Track ( src/Music/Score/Track.hs, dist/build/Music/Score/Track.o )
[ 9 of 14] Compiling Music.Score.Voice ( src/Music/Score/Voice.hs, dist/build/Music/Score/Voice.o )

src/Music/Score/Voice.hs:108:9: error:
    • Non type-variable argument in the constraint: Eq (Voice a1)
      (Use FlexibleContexts to permit this)
    • When checking the inferred type
        extract :: forall (m :: * -> *) a.
                   (HasVoice a, Eq (Voice a), MonadPlus m) =>
                   Voice a -> m a -> m a
      In an equation for ‘voices’:
          voices sc
            = fmap (flip extract $ sc) (getVoices sc)
            where
                extract v = mfilter ((== v) . getVoice)
cabal: Leaving directory '/tmp/cabal-tmp-27034/music-score-1.2.2'
Installed free-4.12.4
Configuring adjunctions-4.3...
Building adjunctions-4.3...
Installed adjunctions-4.3
Configuring kan-extensions-5.0.1...
Building kan-extensions-5.0.1...
Installed kan-extensions-5.0.1
Configuring lens-4.15.1...
Building lens-4.15.1...
Installed lens-4.15.1
Configuring music-pitch-1.9.0...
Building music-pitch-1.9.0...
Installed music-pitch-1.9.0
cabal: Error: some packages failed to install:
music-preludes-1.2 depends on music-score-1.2.2 which failed to install.
music-score-1.2.2 failed during the building phase. The exception was:
ExitFailure 1