Resolving dependencies...
Configuring mtl-2.2.1...
Configuring text-1.2.2.1...
Building text-1.2.2.1...
Building mtl-2.2.1...
Installed mtl-2.2.1
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Downloading language-bash-0.6.2...
Configuring language-bash-0.6.2...
Building language-bash-0.6.2...
Failed to install language-bash-0.6.2
Build log ( /home/builder/.cabal/logs/language-bash-0.6.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-16682/language-bash-0.6.2'
Configuring language-bash-0.6.2...
Building language-bash-0.6.2...
Preprocessing library language-bash-0.6.2...
[ 1 of 10] Compiling Language.Bash.Pretty ( src/Language/Bash/Pretty.hs, dist/build/Language/Bash/Pretty.o )
[ 2 of 10] Compiling Language.Bash.Parse.Builder ( src/Language/Bash/Parse/Builder.hs, dist/build/Language/Bash/Parse/Builder.o )
[ 3 of 10] Compiling Language.Bash.Operator ( src/Language/Bash/Operator.hs, dist/build/Language/Bash/Operator.o )
[ 4 of 10] Compiling Language.Bash.Word ( src/Language/Bash/Word.hs, dist/build/Language/Bash/Word.o )
[ 5 of 10] Compiling Language.Bash.Expand ( src/Language/Bash/Expand.hs, dist/build/Language/Bash/Expand.o )

src/Language/Bash/Expand.hs:124:31: error:
    • Overlapping instances for Data.String.IsString [Span]
        arising from the literal ‘"{"’
      Matching instances:
        instance a ~ Char => Data.String.IsString [a]
          -- Defined in ‘Data.String’
        instance [safe] Data.String.IsString Word
          -- Defined at src/Language/Bash/Word.hs:43:10
    • In the first argument of ‘(++)’, namely ‘"{"’
      In the expression: "{" ++ s ++ "}"
      In the first argument of ‘map’, namely ‘(\ s -> "{" ++ s ++ "}")’
cabal: Leaving directory '/tmp/cabal-tmp-16682/language-bash-0.6.2'
cabal: Error: some packages failed to install:
language-bash-0.6.2 failed during the building phase. The exception was:
ExitFailure 1