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:
parsec-3.1.13.0
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.
Downloading  base-noprelude-4.12.0.0
Starting     call-stack-0.1.0
Downloading  mtlparse-0.1.4.0
Starting     containers-0.5.11.0
Downloaded   base-noprelude-4.12.0.0
Starting     base-noprelude-4.12.0.0
Downloaded   mtlparse-0.1.4.0
Starting     mtlparse-0.1.4.0
Building     call-stack-0.1.0
Building     containers-0.5.11.0
Building     base-noprelude-4.12.0.0
Building     mtlparse-0.1.4.0
Completed    base-noprelude-4.12.0.0
Completed    call-stack-0.1.0
Starting     HUnit-1.6.0.0
Building     HUnit-1.6.0.0
Completed    mtlparse-0.1.4.0
Completed    HUnit-1.6.0.0
Downloading  regexpr-0.5.4
Downloaded   regexpr-0.5.4
Starting     regexpr-0.5.4
Building     regexpr-0.5.4
Completed    regexpr-0.5.4
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
Downloading  bizzlelude-1.6.0
Downloaded   bizzlelude-1.6.0
Starting     bizzlelude-1.6.0
Building     bizzlelude-1.6.0
Completed    bizzlelude-1.6.0