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-8.6.3
ghci-8.6.3
ghc-8.6.3
ghc-boot-8.6.3
Continuing even though the plan contains dangerous reinstalls.
Starting     StateVar-1.1.1.1
Starting     cabal-doctest-1.0.6
Starting     base-orphans-0.8.1
Starting     colour-2.3.5
Building     StateVar-1.1.1.1
Building     colour-2.3.5
Building     base-orphans-0.8.1
Building     cabal-doctest-1.0.6
Completed    base-orphans-0.8.1
Starting     containers-0.5.11.0
Completed    StateVar-1.1.1.1
Starting     integer-logarithms-1.0.3
Building     containers-0.5.11.0
Building     integer-logarithms-1.0.3
Completed    cabal-doctest-1.0.6
Starting     monads-tf-0.1.0.3
Building     monads-tf-0.1.0.3
Completed    integer-logarithms-1.0.3
Starting     primitive-0.7.0.0
Building     primitive-0.7.0.0
Completed    colour-2.3.5
Starting     semigroups-0.19
Completed    monads-tf-0.1.0.3
Starting     split-0.2.3.3
Building     semigroups-0.19
Building     split-0.2.3.3
Completed    semigroups-0.19
Starting     tagged-0.8.6
Building     tagged-0.8.6
Completed    split-0.2.3.3
Starting     transformers-compat-0.6.5
Building     transformers-compat-0.6.5
Completed    tagged-0.8.6
Starting     unix-compat-0.5.1
Building     unix-compat-0.5.1
Completed    transformers-compat-0.6.5
Starting     utf8-string-1.0.1.1
Building     utf8-string-1.0.1.1
Completed    unix-compat-0.5.1
Starting     contravariant-1.5.1
Building     contravariant-1.5.1
Completed    primitive-0.7.0.0
Starting     ansi-terminal-0.9.1
Building     ansi-terminal-0.9.1
Completed    utf8-string-1.0.1.1
Starting     distributive-0.6
Completed    contravariant-1.5.1
Starting     filemanip-0.3.6.3
Building     filemanip-0.3.6.3
Building     distributive-0.6
Completed    ansi-terminal-0.9.1
Starting     ansi-wl-pprint-0.6.9
Building     ansi-wl-pprint-0.6.9
Completed    filemanip-0.3.6.3
Completed    distributive-0.6
Completed    ansi-wl-pprint-0.6.9
Starting     optparse-applicative-0.14.3.0
Building     optparse-applicative-0.14.3.0
Completed    optparse-applicative-0.14.3.0
Completed    containers-0.5.11.0
Starting     language-python-0.5.6
Starting     th-abstraction-0.3.1.0
Starting     binary-0.8.6.0
Starting     comonad-5.0.5
Building     language-python-0.5.6
Building     th-abstraction-0.3.1.0
Building     binary-0.8.6.0
Building     comonad-5.0.5
Completed    th-abstraction-0.3.1.0
Completed    comonad-5.0.5
Starting     bifunctors-5.5.4
Completed    binary-0.8.6.0
Starting     text-1.2.3.1
Building     bifunctors-5.5.4
Building     text-1.2.3.1
Completed    bifunctors-5.5.4
Starting     profunctors-5.4
Building     profunctors-5.4
Completed    profunctors-5.4
Completed    text-1.2.3.1
Starting     xml-1.3.14
Starting     hashable-1.3.0.0
Building     xml-1.3.14
Building     hashable-1.3.0.0
Completed    hashable-1.3.0.0
Starting     unordered-containers-0.2.10.0
Starting     scientific-0.3.6.2
Completed    xml-1.3.14
Starting     xcb-types-0.10.0
Building     unordered-containers-0.2.10.0
Building     scientific-0.3.6.2
Building     xcb-types-0.10.0
Completed    scientific-0.3.6.2
Starting     attoparsec-0.13.2.2
Building     attoparsec-0.13.2.2
Completed    xcb-types-0.10.0
Completed    unordered-containers-0.2.10.0
Starting     semigroupoids-5.3.2
Building     semigroupoids-5.3.2
Completed    attoparsec-0.13.2.2
Completed    semigroupoids-5.3.2
Starting     either-5.0.1.1
Building     either-5.0.1.1
Completed    either-5.0.1.1
Completed    language-python-0.5.6
Downloading  xcffib-0.8.1
Downloaded   xcffib-0.8.1
Starting     xcffib-0.8.1
Building     xcffib-0.8.1
Completed    xcffib-0.8.1