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
Continuing even though the plan contains dangerous reinstalls.
Starting     Diff-0.3.4
Starting     dlist-0.8.0.7
Starting     base-orphans-0.8.1
Starting     base-compat-0.10.5
Building     Diff-0.3.4
Building     dlist-0.8.0.7
Building     base-orphans-0.8.1
Building     base-compat-0.10.5
Completed    base-orphans-0.8.1
Starting     hashable-1.3.0.0
Building     hashable-1.3.0.0
Completed    Diff-0.3.4
Starting     integer-logarithms-1.0.3
Completed    dlist-0.8.0.7
Starting     random-1.1
Building     integer-logarithms-1.0.3
Building     random-1.1
Completed    integer-logarithms-1.0.3
Starting     th-abstraction-0.3.1.0
Building     th-abstraction-0.3.1.0
Completed    hashable-1.3.0.0
Starting     transformers-0.5.6.2
Completed    base-compat-0.10.5
Building     transformers-0.5.6.2
Starting     time-compat-1.9.2.2
Completed    random-1.1
Starting     unordered-containers-0.2.10.0
Building     time-compat-1.9.2.2
Building     unordered-containers-0.2.10.0
Completed    th-abstraction-0.3.1.0
Starting     uuid-types-1.0.3
Building     uuid-types-1.0.3
Completed    time-compat-1.9.2.2
Completed    uuid-types-1.0.3
Completed    unordered-containers-0.2.10.0
Completed    transformers-0.5.6.2
Starting     tagged-0.8.6
Starting     mtl-2.2.2
Starting     primitive-0.7.0.0
Building     tagged-0.8.6
Building     mtl-2.2.2
Building     primitive-0.7.0.0
Completed    tagged-0.8.6
Completed    mtl-2.2.2
Completed    primitive-0.7.0.0
Starting     scientific-0.3.6.2
Starting     vector-0.12.0.3
Building     scientific-0.3.6.2
Building     vector-0.12.0.3
Completed    scientific-0.3.6.2
Starting     attoparsec-0.13.2.3
Building     attoparsec-0.13.2.3
Completed    attoparsec-0.13.2.3
Completed    vector-0.12.0.3
Starting     aeson-1.4.4.0
Building     aeson-1.4.4.0
Completed    aeson-1.4.4.0
Starting     ron-0.9
Building     ron-0.9
Completed    ron-0.9
Starting     ron-rdt-0.9.1
Building     ron-rdt-0.9.1
Completed    ron-rdt-0.9.1