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     mmsyn5-0.4.2.2
Starting     primitive-0.7.0.0
Building     mmsyn5-0.4.2.2
Building     mmsyn3-0.1.4.0
Building     primitive-0.7.0.0
Completed    mmsyn5-0.4.2.2
Completed    mmsyn3-0.1.4.0
Completed    primitive-0.7.0.0
Starting     vector-0.12.0.3
Building     vector-0.12.0.3
Completed    vector-0.12.0.3
Starting     mmsyn2-0.1.7.0
Building     mmsyn2-0.1.7.0
Completed    mmsyn2-0.1.7.0
Starting     mmsyn6ukr-0.6.2.0
Building     mmsyn6ukr-0.6.2.0
Completed    mmsyn6ukr-0.6.2.0
Starting     mmsyn7s-0.1.1.0
Building     mmsyn7s-0.1.1.0
Completed    mmsyn7s-0.1.1.0
Starting     mmsyn7h-0.4.0.2
Building     mmsyn7h-0.4.0.2
Failed to install mmsyn7h-0.4.0.2
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/mmsyn7h-0.4.0.2-7EY7LqpXHzL9Ne0qCCXknu.log ):
cabal: Entering directory '/tmp/cabal-tmp-31143/mmsyn7h-0.4.0.2'
Configuring mmsyn7h-0.4.0.2...
Preprocessing executable 'mmsyn7h' for mmsyn7h-0.4.0.2..
Building executable 'mmsyn7h' for mmsyn7h-0.4.0.2..

<no location info>: warning: [-Wmissing-home-modules]
    These modules are needed for compilation but not listed in your .cabal file's other-modules: 
        MMSyn7h
[1 of 2] Compiling MMSyn7h          ( MMSyn7h.hs, dist/build/mmsyn7h/mmsyn7h-tmp/MMSyn7h.o )

MMSyn7h.hs:72:25: error:
    The last statement in a 'do' block must be an expression
      _ <- readProcessWithExitCode
             (fromJust . showE $ "sox")
             [nameSF ++ snd ws, "-t", "waveaudio", "-d"]
             ""
             >> return ()
   |
72 |                         _ <- readProcessWithExitCode (fromJust . showE $ "sox") [nameSF ++ snd ws, "-t", "waveaudio", "-d"] "" >> return ()
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

MMSyn7h.hs:75:32: error:
    The last statement in a 'do' block must be an expression
      _ <- readProcessWithExitCode
             (fromJust . showE $ "play") [nameSF ++ snd ws] ""
             >> return ()
   |
75 |                                _ <- readProcessWithExitCode (fromJust . showE $ "play") [nameSF ++ snd ws] "" >> return ()
   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-31143/mmsyn7h-0.4.0.2'
cabal: Error: some packages failed to install:
mmsyn7h-0.4.0.2-7EY7LqpXHzL9Ne0qCCXknu failed during the building phase. The
exception was:
ExitFailure 1