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     cpu-0.1.2
Starting     dlist-0.8.0.5
Starting     hashable-1.2.7.0
Starting     base-compat-0.10.5
Building     cpu-0.1.2
Building     dlist-0.8.0.5
Building     hashable-1.2.7.0
Building     base-compat-0.10.5
Completed    cpu-0.1.2
Starting     integer-logarithms-1.0.2.2
Building     integer-logarithms-1.0.2.2
Completed    dlist-0.8.0.5
Starting     path-pieces-0.2.1
Building     path-pieces-0.2.1
Completed    hashable-1.2.7.0
Starting     primitive-0.6.4.0
Completed    integer-logarithms-1.0.2.2
Starting     random-1.1
Building     primitive-0.6.4.0
Building     random-1.1
Completed    path-pieces-0.2.1
Starting     tagged-0.8.6
Building     tagged-0.8.6
Completed    base-compat-0.10.5
Starting     th-abstraction-0.2.10.0
Building     th-abstraction-0.2.10.0
Completed    random-1.1
Starting     time-locale-compat-0.1.1.5
Completed    tagged-0.8.6
Starting     unordered-containers-0.2.9.0
Building     time-locale-compat-0.1.1.5
Building     unordered-containers-0.2.9.0
Completed    time-locale-compat-0.1.1.5
Starting     uuid-types-1.0.3
Building     uuid-types-1.0.3
Completed    th-abstraction-0.2.10.0
Completed    uuid-types-1.0.3
Completed    primitive-0.6.4.0
Starting     scientific-0.3.6.2
Starting     posix-api-0.1.0.0
Starting     vector-0.12.0.2
Completed    unordered-containers-0.2.9.0
Starting     contiguous-0.3.2.0
Building     scientific-0.3.6.2
Building     posix-api-0.1.0.0
Building     vector-0.12.0.2
Building     contiguous-0.3.2.0
Failed to install posix-api-0.1.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/posix-api-0.1.0.0-275krMPZxPr8oUfOjYuh6e.log ):
cabal: Entering directory '/tmp/cabal-tmp-30653/posix-api-0.1.0.0'
Configuring posix-api-0.1.0.0...
Preprocessing library for posix-api-0.1.0.0..
Building library for posix-api-0.1.0.0..
[1 of 6] Compiling Posix.Directory  ( src/Posix/Directory.hs, dist/build/Posix/Directory.o )
[2 of 6] Compiling Posix.Socket.Types ( dist/build/Posix/Socket/Types.hs, dist/build/Posix/Socket/Types.o )

src/Posix/Socket/Types.hsc:170:15: error: parse error on input ‘{’
    |
170 | peek = Flags #{const MSG_PEEK}
    |               ^
cabal: Leaving directory '/tmp/cabal-tmp-30653/posix-api-0.1.0.0'
Completed    contiguous-0.3.2.0
Completed    scientific-0.3.6.2
Completed    vector-0.12.0.2
cabal: Error: some packages failed to install:
ping-0.1.0.1-AsSO8jp6AbA78ojFAf213Q depends on ping-0.1.0.1 which failed to
install.
posix-api-0.1.0.0-275krMPZxPr8oUfOjYuh6e failed during the building phase. The
exception was:
ExitFailure 1