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     abstract-par-0.3.3
Building     StateVar-1.1.1.1
Building     abstract-par-0.3.3
Completed    abstract-par-0.3.3
Starting     base-orphans-0.8
Completed    StateVar-1.1.1.1
Starting     cabal-doctest-1.0.6
Building     base-orphans-0.8
Building     cabal-doctest-1.0.6
Completed    base-orphans-0.8
Starting     containers-0.5.11.0
Building     containers-0.5.11.0
Completed    cabal-doctest-1.0.6
Starting     data-default-class-0.1.2.0
Building     data-default-class-0.1.2.0
Completed    data-default-class-0.1.2.0
Starting     data-inttrie-0.1.4
Building     data-inttrie-0.1.4
Completed    data-inttrie-0.1.4
Starting     lazy-io-0.1.0
Building     lazy-io-0.1.0
Completed    lazy-io-0.1.0
Starting     logfloat-0.13.3.3
Building     logfloat-0.13.3.3
Completed    logfloat-0.13.3.3
Starting     primitive-0.6.4.0
Building     primitive-0.6.4.0
Completed    primitive-0.6.4.0
Starting     random-1.1
Building     random-1.1
Completed    random-1.1
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     contravariant-1.5
Building     contravariant-1.5
Completed    containers-0.5.11.0
Starting     data-memocombinators-0.5.1
Building     data-memocombinators-0.5.1
Completed    data-memocombinators-0.5.1
Starting     vector-0.12.0.1
Completed    contravariant-1.5
Starting     distributive-0.6
Building     vector-0.12.0.1
Building     distributive-0.6
Completed    distributive-0.6
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     cereal-0.5.7.0
Building     cereal-0.5.7.0
Completed    cereal-0.5.7.0
Starting     binary-0.8.6.0
Building     binary-0.8.6.0
Completed    vector-0.12.0.1
Starting     abstract-deque-0.3
Building     abstract-deque-0.3
Completed    abstract-deque-0.3
Starting     comonad-5.0.4
Completed    binary-0.8.6.0
Starting     temporary-1.2.1.1
Building     temporary-1.2.1.1
Building     comonad-5.0.4
Completed    temporary-1.2.1.1
Starting     monad-par-extras-0.3.3
Building     monad-par-extras-0.3.3
Completed    comonad-5.0.4
Starting     vector-th-unbox-0.2.1.6
Completed    monad-par-extras-0.3.3
Starting     vector-binary-0.1.1
Building     vector-th-unbox-0.2.1.6
Building     vector-binary-0.1.1
Completed    vector-binary-0.1.1
Starting     text-1.2.3.1
Completed    vector-th-unbox-0.2.1.6
Starting     pedestrian-dag-0.2.0
Building     text-1.2.3.1
Building     pedestrian-dag-0.2.0
Completed    pedestrian-dag-0.2.0
Starting     bifunctors-5.5.3
Building     bifunctors-5.5.3
Completed    bifunctors-5.5.3
Starting     math-functions-0.3.0.2
Building     math-functions-0.3.0.2
Completed    text-1.2.3.1
Starting     hashable-1.2.7.0
Building     hashable-1.2.7.0
Completed    math-functions-0.3.0.2
Starting     mwc-random-0.14.0.0
Building     mwc-random-0.14.0.0
Completed    hashable-1.2.7.0
Starting     unordered-containers-0.2.9.0
Building     unordered-containers-0.2.9.0
Completed    mwc-random-0.14.0.0
Starting     monad-par-0.3.4.8
Building     monad-par-0.3.4.8
Completed    unordered-containers-0.2.9.0
Starting     semigroupoids-5.2.2
Completed    monad-par-0.3.4.8
Starting     sgd-0.4.0.1
Building     semigroupoids-5.2.2
Building     sgd-0.4.0.1
Completed    sgd-0.4.0.1
Completed    semigroupoids-5.2.2
Starting     data-lens-2.11.2
Building     data-lens-2.11.2
Completed    data-lens-2.11.2
Starting     monad-codec-0.2.0
Building     monad-codec-0.2.0
Completed    monad-codec-0.2.0
Starting     crf-chain1-constrained-0.6.0
Building     crf-chain1-constrained-0.6.0
Completed    crf-chain1-constrained-0.6.0