Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
Starting     mmsyn3-0.1.4.0
Starting     mmsyn5-0.4.3.0
Starting     primitive-0.7.0.1
Building     mmsyn3-0.1.4.0
Building     mmsyn5-0.4.3.0
Building     primitive-0.7.0.1
Completed    mmsyn5-0.4.3.0
Completed    mmsyn3-0.1.4.0
Completed    primitive-0.7.0.1
Starting     vector-0.12.1.2
Building     vector-0.12.1.2
Completed    vector-0.12.1.2
Starting     mmsyn2-0.1.7.0
Building     mmsyn2-0.1.7.0
Completed    mmsyn2-0.1.7.0
Starting     mmsyn6ukr-0.6.3.1
Building     mmsyn6ukr-0.6.3.1
Completed    mmsyn6ukr-0.6.3.1
Starting     mmsyn7s-0.6.6.0
Starting     mmsyn7ukr-0.15.3.0
Building     mmsyn7s-0.6.6.0
Building     mmsyn7ukr-0.15.3.0
Completed    mmsyn7s-0.6.6.0
Completed    mmsyn7ukr-0.15.3.0
Starting     dobutokO2-0.17.0.0
Building     dobutokO2-0.17.0.0
Failed to install dobutokO2-0.17.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/dobutokO2-0.17.0.0-Cl0uoVaPz4b5pAKsV5Mvcz.log ):
cabal: Entering directory '/tmp/cabal-tmp-32565/dobutokO2-0.17.0.0'
Configuring dobutokO2-0.17.0.0...
Preprocessing executable 'dobutokO2' for dobutokO2-0.17.0.0..
Building executable 'dobutokO2' for dobutokO2-0.17.0.0..

<no location info>: warning: [-Wmissing-home-modules]
    These modules are needed for compilation but not listed in your .cabal file's other-modules: 
        DobutokO.Sound
        DobutokO.Sound.Executable
        DobutokO.Sound.IntermediateF
[1 of 4] Compiling DobutokO.Sound   ( DobutokO/Sound.hs, dist/build/dobutokO2/dobutokO2-tmp/DobutokO/Sound.o )
[2 of 4] Compiling DobutokO.Sound.IntermediateF ( DobutokO/Sound/IntermediateF.hs, dist/build/dobutokO2/dobutokO2-tmp/DobutokO/Sound/IntermediateF.o )

DobutokO/Sound/IntermediateF.hs:295:7: error:
    parse error on input ‘->’
    |
295 |     - -> do
    |       ^^
cabal: Leaving directory '/tmp/cabal-tmp-32565/dobutokO2-0.17.0.0'
cabal: Error: some packages failed to install:
dobutokO2-0.17.0.0-Cl0uoVaPz4b5pAKsV5Mvcz failed during the building phase.
The exception was:
ExitFailure 1