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-1.0.7
Starting     data-default-class-0.1.2.0
Starting     primitive-0.7.0.0
Starting     transformers-compat-0.6.5
Building     cabal-doctest-1.0.7
Building     data-default-class-0.1.2.0
Building     transformers-compat-0.6.5
Building     primitive-0.7.0.0
Completed    data-default-class-0.1.2.0
Starting     unliftio-core-0.1.2.0
Building     unliftio-core-0.1.2.0
Completed    cabal-doctest-1.0.7
Completed    transformers-compat-0.6.5
Starting     exceptions-0.10.3
Completed    unliftio-core-0.1.2.0
Building     exceptions-0.10.3
Completed    exceptions-0.10.3
Completed    primitive-0.7.0.0
Starting     atomic-primops-0.8.3
Starting     vector-0.12.0.3
Building     atomic-primops-0.8.3
Building     vector-0.12.0.3
Completed    atomic-primops-0.8.3
Downloading  scheduler-1.4.2.1
Downloaded   scheduler-1.4.2.1
Starting     scheduler-1.4.2.1
Building     scheduler-1.4.2.1
Completed    scheduler-1.4.2.1
Completed    vector-0.12.0.3
Downloading  massiv-0.4.2.0
Downloaded   massiv-0.4.2.0
Starting     massiv-0.4.2.0
Building     massiv-0.4.2.0
Completed    massiv-0.4.2.0