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...
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Building     call-stack-0.2.0
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Starting     digest-0.0.1.2
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Starting     hashable-1.3.0.0
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Starting     tagged-0.8.6
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Starting     th-abstraction-0.3.1.0
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Completed    tagged-0.8.6
Starting     transformers-compat-0.6.5
Completed    reflection-2.1.5
Starting     type-equality-1
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Building     type-equality-1
Completed    type-equality-1
Starting     void-0.7.3
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Starting     zlib-0.6.2.1
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Starting     contravariant-1.5.2
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Starting     unordered-containers-0.2.10.0
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Starting     distributive-0.6.1
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Starting     transformers-base-0.4.5.2
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Starting     zip-archive-0.4.1
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Starting     comonad-5.0.5
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Completed    zip-archive-0.4.1
Completed    comonad-5.0.5
Starting     bifunctors-5.5.5
Building     bifunctors-5.5.5
Completed    bifunctors-5.5.5
Starting     semigroupoids-5.3.3
Starting     profunctors-5.5
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Building     semigroupoids-5.3.3
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Completed    profunctors-5.5
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Starting     free-5.1.2
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Completed    free-5.1.2
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-4.18
Building     lens-4.18
Completed    lens-4.18
Downloading  dirtree-0.1.0
Downloaded   dirtree-0.1.0
Starting     dirtree-0.1.0
Building     dirtree-0.1.0
Completed    dirtree-0.1.0