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     dual-0.1.1.1
Starting     util-0.1.17.1
Starting     base-unicode-symbols-0.2.4.2
Building     base-unicode-symbols-0.2.4.2
Building     util-0.1.17.1
Building     dual-0.1.1.1
Completed    dual-0.1.1.1
Completed    base-unicode-symbols-0.2.4.2
Completed    util-0.1.17.1
Starting     alg-0.2.13.1
Building     alg-0.2.13.1
Completed    alg-0.2.13.1
Starting     category-0.2.5.0
Building     category-0.2.5.0
Completed    category-0.2.5.0
Downloading  ix-0.1.1.0
Downloaded   ix-0.1.1.0
Starting     ix-0.1.1.0
Building     ix-0.1.1.0
Completed    ix-0.1.1.0