Resolving dependencies...
Starting     StateVar-1.2
Starting     cabal-doctest-1.0.8
Starting     exceptions-0.10.4
Starting     base-orphans-0.8.2
Building     StateVar-1.2
Building     cabal-doctest-1.0.8
Building     exceptions-0.10.4
Building     base-orphans-0.8.2
Completed    StateVar-1.2
Starting     filepath-bytestring-1.4.2.1.6
Building     filepath-bytestring-1.4.2.1.6
Completed    cabal-doctest-1.0.8
Starting     hashable-1.3.0.0
Building     hashable-1.3.0.0
Completed    exceptions-0.10.4
Starting     integer-logarithms-1.0.3
Completed    base-orphans-0.8.2
Starting     primitive-0.7.1.0
Building     integer-logarithms-1.0.3
Building     primitive-0.7.1.0
Completed    filepath-bytestring-1.4.2.1.6
Starting     stringsearch-0.3.6.6
Building     stringsearch-0.3.6.6
Completed    integer-logarithms-1.0.3
Starting     tagged-0.8.6
Completed    hashable-1.3.0.0
Starting     th-abstraction-0.3.2.0
Building     tagged-0.8.6
Building     th-abstraction-0.3.2.0
Completed    tagged-0.8.6
Starting     transformers-compat-0.6.5
Building     transformers-compat-0.6.5
Completed    stringsearch-0.3.6.6
Starting     void-0.7.3
Completed    th-abstraction-0.3.2.0
Starting     contravariant-1.5.2
Building     void-0.7.3
Building     contravariant-1.5.2
Completed    void-0.7.3
Starting     unordered-containers-0.2.12.0
Building     unordered-containers-0.2.12.0
Completed    transformers-compat-0.6.5
Starting     distributive-0.6.2
Completed    contravariant-1.5.2
Starting     transformers-base-0.4.5.2
Building     transformers-base-0.4.5.2
Building     distributive-0.6.2
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Starting     mmorph-1.1.3
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Starting     scientific-0.3.6.2
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Starting     comonad-5.0.6
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Starting     pipes-4.3.14
Building     pipes-4.3.14
Building     comonad-5.0.6
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Starting     attoparsec-0.13.2.4
Building     attoparsec-0.13.2.4
Completed    unordered-containers-0.2.12.0
Completed    comonad-5.0.6
Starting     bifunctors-5.5.7
Building     bifunctors-5.5.7
Completed    pipes-4.3.14
Starting     pipes-parse-3.0.8
Building     pipes-parse-3.0.8
Completed    pipes-parse-3.0.8
Completed    attoparsec-0.13.2.4
Starting     pipes-attoparsec-0.5.1.5
Building     pipes-attoparsec-0.5.1.5
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Completed    bifunctors-5.5.7
Starting     profunctors-5.5.2
Starting     semigroupoids-5.3.4
Building     profunctors-5.5.2
Building     semigroupoids-5.3.4
Completed    profunctors-5.5.2
Completed    semigroupoids-5.3.4
Starting     free-5.1.3
Building     free-5.1.3
Completed    free-5.1.3
Starting     pipes-group-1.0.12
Building     pipes-group-1.0.12
Completed    pipes-group-1.0.12
Starting     pipes-bytestring-2.1.6
Building     pipes-bytestring-2.1.6
Completed    pipes-bytestring-2.1.6
Starting     ghc-tags-core-0.2.4.0
Failed to install ghc-tags-core-0.2.4.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/ghc-tags-core-0.2.4.0-9OvsNwm2K7MElScQyZZRmR.log ):
cabal: Entering directory '/tmp/cabal-tmp-26048/ghc-tags-core-0.2.4.0'
Configuring ghc-tags-core-0.2.4.0...
cabal: The program 'cpphs' version >=1.20 is required but it could not be
found.

cabal: Leaving directory '/tmp/cabal-tmp-26048/ghc-tags-core-0.2.4.0'
cabal: Error: some packages failed to install:
ghc-tags-core-0.2.4.0-9OvsNwm2K7MElScQyZZRmR failed during the configure step.
The exception was:
ExitFailure 1