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     hs-functors-0.1.4.0
Starting     base-unicode-symbols-0.2.4.2
Building     hs-functors-0.1.4.0
Building     base-unicode-symbols-0.2.4.2
Completed    base-unicode-symbols-0.2.4.2
Completed    hs-functors-0.1.4.0
Starting     lenz-0.4.1.0
Building     lenz-0.4.1.0
Completed    lenz-0.4.1.0
Downloading  lenz-mtl-0.1
Downloaded   lenz-mtl-0.1
Starting     lenz-mtl-0.1
Building     lenz-mtl-0.1
Completed    lenz-mtl-0.1