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:
process-1.6.3.0
haskeline-0.7.4.3
ghc-8.6.3
Cabal-2.4.0.1
libiserv-8.6.3
ghci-8.6.3
directory-1.3.3.0
hpc-0.6.0.3
ghc-boot-8.6.3
parsec-3.1.13.0
Continuing even though the plan contains dangerous reinstalls.
Starting     dlist-0.8.0.8
Starting     base-orphans-0.8.2
Starting     bytestring-0.10.10.0
Starting     containers-0.6.2.1
Building     base-orphans-0.8.2
Building     dlist-0.8.0.8
Building     containers-0.6.2.1
Building     bytestring-0.10.10.0
Completed    dlist-0.8.0.8
Starting     integer-logarithms-1.0.3
Building     integer-logarithms-1.0.3
Completed    base-orphans-0.8.2
Starting     parser-combinators-1.2.1
Building     parser-combinators-1.2.1
Completed    integer-logarithms-1.0.3
Starting     random-1.1
Building     random-1.1
Completed    parser-combinators-1.2.1
Starting     transformers-0.5.6.2
Building     transformers-0.5.6.2
Completed    random-1.1
Starting     time-compat-1.9.3
Building     time-compat-1.9.3
Completed    time-compat-1.9.3
Completed    bytestring-0.10.10.0
Starting     unix-2.7.2.2
Completed    transformers-0.5.6.2
Starting     tagged-0.8.6
Starting     primitive-0.7.0.1
Building     tagged-0.8.6
Building     primitive-0.7.0.1
Building     unix-2.7.2.2
Completed    tagged-0.8.6
Starting     mtl-2.2.2
Building     mtl-2.2.2
Completed    mtl-2.2.2
Completed    primitive-0.7.0.1
Starting     vector-0.12.1.2
Building     vector-0.12.1.2
Completed    containers-0.6.2.1
Starting     th-abstraction-0.3.2.0
Starting     binary-0.8.8.0
Completed    unix-2.7.2.2
Starting     base-compat-0.11.1
Building     th-abstraction-0.3.2.0
Building     binary-0.8.8.0
Building     base-compat-0.11.1
Completed    th-abstraction-0.3.2.0
Completed    binary-0.8.8.0
Starting     text-1.2.4.0
Completed    base-compat-0.11.1
Starting     base-compat-batteries-0.11.1
Building     text-1.2.4.0
Building     base-compat-batteries-0.11.1
Completed    base-compat-batteries-0.11.1
Completed    vector-0.12.1.2
Completed    text-1.2.4.0
Starting     hashable-1.3.0.0
Building     hashable-1.3.0.0
Completed    hashable-1.3.0.0
Starting     uuid-types-1.0.3
Starting     scientific-0.3.6.2
Starting     unordered-containers-0.2.10.0
Starting     case-insensitive-1.2.1.0
Building     scientific-0.3.6.2
Building     uuid-types-1.0.3
Building     unordered-containers-0.2.10.0
Building     case-insensitive-1.2.1.0
Completed    case-insensitive-1.2.1.0
Completed    uuid-types-1.0.3
Completed    scientific-0.3.6.2
Starting     megaparsec-8.0.0
Starting     attoparsec-0.13.2.4
Building     megaparsec-8.0.0
Building     attoparsec-0.13.2.4
Completed    unordered-containers-0.2.10.0
Completed    attoparsec-0.13.2.4
Starting     aeson-1.4.7.1
Building     aeson-1.4.7.1
Completed    megaparsec-8.0.0
Starting     neat-interpolation-0.5.1
Building     neat-interpolation-0.5.1
Completed    neat-interpolation-0.5.1
Completed    aeson-1.4.7.1
Downloading  plzwrk-0.0.0.1
Downloaded   plzwrk-0.0.0.1
Starting     plzwrk-0.0.0.1
Building     plzwrk-0.0.0.1
Completed    plzwrk-0.0.0.1