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     integer-logarithms-1.0.3
Starting     numtype-dk-0.5.0.2
Starting     hashable-1.2.7.0
Starting     primitive-0.6.4.0
Building     numtype-dk-0.5.0.2
Building     hashable-1.2.7.0
Building     integer-logarithms-1.0.3
Building     primitive-0.6.4.0
Completed    numtype-dk-0.5.0.2
Starting     random-1.1
Completed    integer-logarithms-1.0.3
Starting     exact-pi-0.5.0.1
Building     random-1.1
Building     exact-pi-0.5.0.1
Completed    hashable-1.2.7.0
Starting     unordered-containers-0.2.10.0
Building     unordered-containers-0.2.10.0
Completed    exact-pi-0.5.0.1
Completed    random-1.1
Completed    primitive-0.6.4.0
Starting     vector-0.12.0.2
Completed    unordered-containers-0.2.10.0
Building     vector-0.12.0.2
Completed    vector-0.12.0.2
Starting     semirings-0.3.1.2
Building     semirings-0.3.1.2
Completed    semirings-0.3.1.2
Downloading  arithmoi-0.9.0.0
Downloaded   arithmoi-0.9.0.0
Starting     arithmoi-0.9.0.0
Building     arithmoi-0.9.0.0
Completed    arithmoi-0.9.0.0