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...
Warning: The following packages are likely to be broken by the reinstalls:
Cabal-2.4.0.1
libiserv-8.6.3
ghci-8.6.3
ghc-8.6.3
ghc-boot-8.6.3
Continuing even though the plan contains dangerous reinstalls.
Starting     containers-0.5.11.0
Building     containers-0.5.11.0
Completed    containers-0.5.11.0
Starting     binary-0.8.6.0
Building     binary-0.8.6.0
Completed    binary-0.8.6.0
Starting     text-1.2.3.1
Building     text-1.2.3.1
Completed    text-1.2.3.1
Starting     parsec-3.1.13.0
Building     parsec-3.1.13.0
Completed    parsec-3.1.13.0
Starting     brain-bleep-0.1.0.2
Building     brain-bleep-0.1.0.2
Completed    brain-bleep-0.1.0.2