Resolving dependencies...
Starting     StateVar-1.2.1
Starting     filepath-bytestring-1.4.2.1.6
Starting     hashable-1.3.1.0
Starting     base-orphans-0.8.4
Building     StateVar-1.2.1
Building     filepath-bytestring-1.4.2.1.6
Building     hashable-1.3.1.0
Building     base-orphans-0.8.4
Completed    StateVar-1.2.1
Starting     indexed-traversable-0.1.1
Building     indexed-traversable-0.1.1
Completed    filepath-bytestring-1.4.2.1.6
Starting     integer-logarithms-1.0.3.1
Building     integer-logarithms-1.0.3.1
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Starting     primitive-0.7.1.0
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Completed    base-orphans-0.8.4
Starting     stringsearch-0.3.6.6
Completed    integer-logarithms-1.0.3.1
Starting     tagged-0.8.6.1
Building     stringsearch-0.3.6.6
Building     tagged-0.8.6.1
Completed    indexed-traversable-0.1.1
Starting     th-abstraction-0.4.2.0
Building     th-abstraction-0.4.2.0
Completed    tagged-0.8.6.1
Starting     transformers-compat-0.6.6
Building     transformers-compat-0.6.6
Completed    stringsearch-0.3.6.6
Starting     void-0.7.3
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Starting     contravariant-1.5.3
Building     void-0.7.3
Building     contravariant-1.5.3
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Starting     unordered-containers-0.2.13.0
Completed    void-0.7.3
Starting     distributive-0.6.2.1
Building     unordered-containers-0.2.13.0
Building     distributive-0.6.2.1
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Starting     transformers-base-0.4.5.2
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Starting     mmorph-1.1.5
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Starting     pipes-4.3.15
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Starting     bifunctors-5.5.10
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Starting     attoparsec-0.13.2.5
Building     bifunctors-5.5.10
Building     attoparsec-0.13.2.5
Completed    unordered-containers-0.2.13.0
Completed    pipes-4.3.15
Starting     pipes-parse-3.0.9
Building     pipes-parse-3.0.9
Completed    pipes-parse-3.0.9
Completed    attoparsec-0.13.2.5
Starting     pipes-attoparsec-0.5.1.5
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Starting     profunctors-5.6.2
Starting     semigroupoids-5.3.5
Completed    pipes-attoparsec-0.5.1.5
Building     profunctors-5.6.2
Building     semigroupoids-5.3.5
Completed    profunctors-5.6.2
Completed    semigroupoids-5.3.5
Starting     free-5.1.6
Building     free-5.1.6
Completed    free-5.1.6
Starting     pipes-group-1.0.12
Building     pipes-group-1.0.12
Completed    pipes-group-1.0.12
Starting     pipes-bytestring-2.1.7
Building     pipes-bytestring-2.1.7
Completed    pipes-bytestring-2.1.7
Starting     ghc-tags-core-0.2.4.1
Failed to install ghc-tags-core-0.2.4.1
Build log ( /home/builder/.cabal/logs/ghc-8.10.2/ghc-tags-core-0.2.4.1-4p4SWpIk9A9LRJTP2Y6rlc.log ):
cabal: Entering directory '/tmp/cabal-tmp-8460/ghc-tags-core-0.2.4.1'
Configuring ghc-tags-core-0.2.4.1...
cabal: The program 'cpphs' version >=1.20 is required but it could not be
found.

cabal: Leaving directory '/tmp/cabal-tmp-8460/ghc-tags-core-0.2.4.1'
cabal: Error: some packages failed to install:
ghc-tags-core-0.2.4.1-4p4SWpIk9A9LRJTP2Y6rlc failed during the configure step.
The exception was:
ExitFailure 1