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-8.6.1
ghci-8.6.1
ghc-8.6.1
ghc-boot-8.6.1
Continuing even though the plan contains dangerous reinstalls.
Starting     StateVar-1.1.1.1
Starting     base-orphans-0.8
Building     base-orphans-0.8
Building     StateVar-1.1.1.1
Completed    base-orphans-0.8
Starting     cabal-doctest-1.0.6
Completed    StateVar-1.1.1.1
Starting     call-stack-0.1.0
Building     cabal-doctest-1.0.6
Building     call-stack-0.1.0
Completed    call-stack-0.1.0
Starting     containers-0.5.11.0
Building     containers-0.5.11.0
Completed    cabal-doctest-1.0.6
Starting     primitive-0.6.4.0
Building     primitive-0.6.4.0
Completed    primitive-0.6.4.0
Starting     reflection-2.1.4
Building     reflection-2.1.4
Completed    reflection-2.1.4
Starting     semigroups-0.18.5
Building     semigroups-0.18.5
Completed    semigroups-0.18.5
Starting     tagged-0.8.6
Building     tagged-0.8.6
Completed    tagged-0.8.6
Starting     transformers-compat-0.6.2
Building     transformers-compat-0.6.2
Completed    transformers-compat-0.6.2
Starting     unliftio-core-0.1.2.0
Building     unliftio-core-0.1.2.0
Completed    unliftio-core-0.1.2.0
Starting     void-0.7.2
Building     void-0.7.2
Completed    void-0.7.2
Starting     contravariant-1.5
Building     contravariant-1.5
Completed    contravariant-1.5
Starting     vector-0.12.0.1
Building     vector-0.12.0.1
Completed    containers-0.5.11.0
Starting     distributive-0.6
Building     distributive-0.6
Completed    distributive-0.6
Starting     transformers-base-0.4.5.2
Building     transformers-base-0.4.5.2
Completed    transformers-base-0.4.5.2
Starting     exceptions-0.10.0
Building     exceptions-0.10.0
Completed    exceptions-0.10.0
Starting     th-abstraction-0.2.8.0
Building     th-abstraction-0.2.8.0
Completed    th-abstraction-0.2.8.0
Starting     parallel-3.2.2.0
Building     parallel-3.2.2.0
Completed    parallel-3.2.2.0
Starting     binary-0.8.6.0
Building     binary-0.8.6.0
Completed    vector-0.12.0.1
Starting     comonad-5.0.4
Completed    binary-0.8.6.0
Starting     resourcet-1.2.2
Building     resourcet-1.2.2
Building     comonad-5.0.4
Completed    resourcet-1.2.2
Starting     text-1.2.3.1
Building     text-1.2.3.1
Completed    comonad-5.0.4
Starting     bifunctors-5.5.3
Building     bifunctors-5.5.3
Completed    bifunctors-5.5.3
Starting     profunctors-5.3
Building     profunctors-5.3
Completed    text-1.2.3.1
Starting     hashable-1.2.7.0
Building     hashable-1.2.7.0
Completed    profunctors-5.3
Starting     generic-lens-1.1.0.0
Building     generic-lens-1.1.0.0
Completed    hashable-1.2.7.0
Starting     unordered-containers-0.2.9.0
Building     unordered-containers-0.2.9.0
Completed    generic-lens-1.1.0.0
Completed    unordered-containers-0.2.9.0
Starting     invariant-0.5.1
Starting     semigroupoids-5.3.1
Building     invariant-0.5.1
Building     semigroupoids-5.3.1
Completed    invariant-0.5.1
Completed    semigroupoids-5.3.1
Starting     free-5.1
Building     free-5.1
Completed    free-5.1
Starting     adjunctions-4.4
Building     adjunctions-4.4
Completed    adjunctions-4.4
Starting     kan-extensions-5.2
Building     kan-extensions-5.2
Completed    kan-extensions-5.2
Starting     lens-4.17
Building     lens-4.17
Completed    lens-4.17
Downloading  arbor-monad-metric-0.0.2
Downloaded   arbor-monad-metric-0.0.2
Starting     arbor-monad-metric-0.0.2
Building     arbor-monad-metric-0.0.2
Completed    arbor-monad-metric-0.0.2