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     cabal-doctest-1.0.6
Starting     data-default-class-0.1.2.0
Starting     base-orphans-0.8.1
Starting     hashable-1.3.0.0
Building     data-default-class-0.1.2.0
Building     base-orphans-0.8.1
Building     cabal-doctest-1.0.6
Building     hashable-1.3.0.0
Completed    base-orphans-0.8.1
Starting     primitive-0.7.0.0
Completed    data-default-class-0.1.2.0
Starting     semigroups-0.19
Building     primitive-0.7.0.0
Building     semigroups-0.19
Completed    cabal-doctest-1.0.6
Starting     transformers-compat-0.6.5
Building     transformers-compat-0.6.5
Completed    semigroups-0.19
Starting     unliftio-core-0.1.2.0
Completed    hashable-1.3.0.0
Starting     unordered-containers-0.2.10.0
Building     unliftio-core-0.1.2.0
Building     unordered-containers-0.2.10.0
Completed    unliftio-core-0.1.2.0
Completed    transformers-compat-0.6.5
Starting     transformers-base-0.4.5.2
Starting     mmorph-1.1.3
Building     transformers-base-0.4.5.2
Building     mmorph-1.1.3
Completed    transformers-base-0.4.5.2
Starting     exceptions-0.10.2
Building     exceptions-0.10.2
Completed    mmorph-1.1.3
Starting     streaming-0.2.2.0
Building     streaming-0.2.2.0
Completed    exceptions-0.10.2
Completed    unordered-containers-0.2.10.0
Completed    primitive-0.7.0.0
Starting     atomic-primops-0.8.3
Starting     vector-0.12.0.3
Building     vector-0.12.0.3
Building     atomic-primops-0.8.3
Completed    atomic-primops-0.8.3
Starting     scheduler-1.1.0
Completed    streaming-0.2.2.0
Building     scheduler-1.1.0
Completed    scheduler-1.1.0
Completed    vector-0.12.0.3
Starting     vector-th-unbox-0.2.1.6
Starting     massiv-0.3.2.0
Building     vector-th-unbox-0.2.1.6
Completed    vector-th-unbox-0.2.1.6
Starting     math-functions-0.3.1.0
Building     massiv-0.3.2.0
Building     math-functions-0.3.1.0
Completed    math-functions-0.3.1.0
Starting     mwc-random-0.14.0.0
Building     mwc-random-0.14.0.0
Completed    mwc-random-0.14.0.0
Completed    massiv-0.3.2.0
Downloading  digraph-0.1.0.1
Downloaded   digraph-0.1.0.1
Starting     digraph-0.1.0.1
Building     digraph-0.1.0.1
Completed    digraph-0.1.0.1