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     colour-2.3.4
Starting     dlist-0.8.0.5
Starting     base-compat-0.10.5
Starting     containers-0.5.11.0
Building     dlist-0.8.0.5
Building     colour-2.3.4
Building     base-compat-0.10.5
Building     containers-0.5.11.0
Completed    dlist-0.8.0.5
Starting     random-1.1
Building     random-1.1
Completed    base-compat-0.10.5
Starting     transformers-compat-0.6.2
Completed    random-1.1
Building     transformers-compat-0.6.2
Completed    colour-2.3.4
Completed    transformers-compat-0.6.2
Starting     exceptions-0.10.0
Building     exceptions-0.10.0
Completed    exceptions-0.10.0
Starting     temporary-1.3
Building     temporary-1.3
Completed    temporary-1.3
Completed    containers-0.5.11.0
Starting     binary-0.8.6.0
Starting     fgl-5.7.0.1
Building     fgl-5.7.0.1
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    fgl-5.7.0.1
Completed    text-1.2.3.1
Starting     wl-pprint-text-1.2.0.0
Starting     polyparse-1.12.1
Starting     parsec-3.1.13.0
Building     wl-pprint-text-1.2.0.0
Building     parsec-3.1.13.0
Building     polyparse-1.12.1
Completed    wl-pprint-text-1.2.0.0
Completed    parsec-3.1.13.0
Completed    polyparse-1.12.1
Starting     graphviz-2999.20.0.3
Building     graphviz-2999.20.0.3
Completed    graphviz-2999.20.0.3
Starting     erd-0.2.0.0
Building     erd-0.2.0.0
Completed    erd-0.2.0.0