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     clock-0.8
Starting     StateVar-1.1.1.1
Starting     co-log-core-0.2.0.0
Starting     base-compat-0.10.5
Building     clock-0.8
Building     StateVar-1.1.1.1
Building     co-log-core-0.2.0.0
Building     base-compat-0.10.5
Completed    StateVar-1.1.1.1
Starting     colour-2.3.5
Completed    clock-0.8
Starting     dlist-0.8.0.6
Building     colour-2.3.5
Completed    co-log-core-0.2.0.0
Starting     hashable-1.2.7.0
Building     dlist-0.8.0.6
Building     hashable-1.2.7.0
Completed    dlist-0.8.0.6
Starting     integer-logarithms-1.0.3
Building     integer-logarithms-1.0.3
Completed    base-compat-0.10.5
Starting     primitive-0.6.4.0
Completed    hashable-1.2.7.0
Starting     random-1.1
Building     primitive-0.6.4.0
Building     random-1.1
Completed    integer-logarithms-1.0.3
Starting     semigroups-0.18.5
Building     semigroups-0.18.5
Completed    colour-2.3.5
Starting     tagged-0.8.6
Completed    semigroups-0.18.5
Starting     th-abstraction-0.3.1.0
Building     tagged-0.8.6
Building     th-abstraction-0.3.1.0
Completed    random-1.1
Starting     time-locale-compat-0.1.1.5
Building     time-locale-compat-0.1.1.5
Completed    time-locale-compat-0.1.1.5
Starting     torsor-0.1
Completed    tagged-0.8.6
Starting     contravariant-1.5.1
Building     torsor-0.1
Building     contravariant-1.5.1
Completed    torsor-0.1
Starting     unordered-containers-0.2.10.0
Completed    th-abstraction-0.3.1.0
Starting     ansi-terminal-0.9
Building     unordered-containers-0.2.10.0
Building     ansi-terminal-0.9
Completed    contravariant-1.5.1
Starting     uuid-types-1.0.3
Building     uuid-types-1.0.3
Completed    ansi-terminal-0.9
Completed    primitive-0.6.4.0
Starting     scientific-0.3.6.2
Starting     vector-0.12.0.3
Completed    uuid-types-1.0.3
Building     vector-0.12.0.3
Building     scientific-0.3.6.2
Completed    scientific-0.3.6.2
Starting     attoparsec-0.13.2.2
Completed    unordered-containers-0.2.10.0
Building     attoparsec-0.13.2.2
Completed    attoparsec-0.13.2.2
Completed    vector-0.12.0.3
Starting     typerep-map-0.3.2
Starting     aeson-1.4.3.0
Building     typerep-map-0.3.2
Building     aeson-1.4.3.0
Completed    typerep-map-0.3.2
Completed    aeson-1.4.3.0
Starting     chronos-1.0.5
Building     chronos-1.0.5
Completed    chronos-1.0.5
Downloading  co-log-0.3.0.0
Downloaded   co-log-0.3.0.0
Starting     co-log-0.3.0.0
Building     co-log-0.3.0.0
Failed to install co-log-0.3.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/co-log-0.3.0.0-7SdkxkoIrtwG2XkjoiGlWh.log ):
cabal: Entering directory '/tmp/cabal-tmp-32646/co-log-0.3.0.0'
Configuring co-log-0.3.0.0...
Preprocessing library for co-log-0.3.0.0..
Building library for co-log-0.3.0.0..
[1 of 9] Compiling Colog.Concurrent.Internal
[2 of 9] Compiling Colog.Concurrent
[3 of 9] Compiling Colog.Contra
[4 of 9] Compiling Colog.Monad
[5 of 9] Compiling Colog.Message
[6 of 9] Compiling Colog.Actions
[7 of 9] Compiling Colog.Pure
[8 of 9] Compiling Colog.Rotation
[9 of 9] Compiling Colog
Preprocessing executable 'play-colog' for co-log-0.3.0.0..
Building executable 'play-colog' for co-log-0.3.0.0..
[1 of 1] Compiling Main
Linking dist/build/play-colog/play-colog ...
Preprocessing executable 'readme' for co-log-0.3.0.0..
Building executable 'readme' for co-log-0.3.0.0..
ghc: could not execute: markdown-unlit
cabal: Leaving directory '/tmp/cabal-tmp-32646/co-log-0.3.0.0'
cabal: Error: some packages failed to install:
co-log-0.3.0.0-7SdkxkoIrtwG2XkjoiGlWh failed during the building phase. The
exception was:
ExitFailure 1