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 Continuing even though the plan contains dangerous reinstalls. Starting base-prelude-1.3 Starting cabal-doctest-1.0.7 Starting base-orphans-0.8.1 Starting data-default-class-0.1.2.0 Building base-prelude-1.3 Building data-default-class-0.1.2.0 Building base-orphans-0.8.1 Building cabal-doctest-1.0.7 Completed base-orphans-0.8.1 Starting hashable-1.3.0.0 Completed data-default-class-0.1.2.0 Starting integer-logarithms-1.0.3 Building hashable-1.3.0.0 Building integer-logarithms-1.0.3 Completed cabal-doctest-1.0.7 Starting safe-0.3.17 Building safe-0.3.17 Completed integer-logarithms-1.0.3 Starting semigroups-0.19.1 Building semigroups-0.19.1 Completed hashable-1.3.0.0 Starting stringsearch-0.3.6.6 Completed semigroups-0.19.1 Starting th-abstraction-0.3.1.0 Completed base-prelude-1.3 Starting transformers-0.5.6.2 Building stringsearch-0.3.6.6 Building th-abstraction-0.3.1.0 Building transformers-0.5.6.2 Completed safe-0.3.17 Starting void-0.7.3 Building void-0.7.3 Completed void-0.7.3 Starting unordered-containers-0.2.10.0 Building unordered-containers-0.2.10.0 Completed th-abstraction-0.3.1.0 Completed stringsearch-0.3.6.6 Completed transformers-0.5.6.2 Starting tagged-0.8.6 Starting transformers-compat-0.6.5 Starting primitive-0.7.0.0 Completed unordered-containers-0.2.10.0 Starting mtl-2.2.2 Building tagged-0.8.6 Building primitive-0.7.0.0 Building transformers-compat-0.6.5 Building mtl-2.2.2 Completed tagged-0.8.6 Starting lens-family-core-2.0.0 Completed transformers-compat-0.6.5 Starting StateVar-1.2 Building lens-family-core-2.0.0 Building StateVar-1.2 Completed mtl-2.2.2 Starting distributive-0.6 Completed StateVar-1.2 Starting transformers-base-0.4.5.2 Building transformers-base-0.4.5.2 Building distributive-0.6 Completed lens-family-core-2.0.0 Starting mmorph-1.1.3 Completed transformers-base-0.4.5.2 Starting exceptions-0.10.3 Building mmorph-1.1.3 Building exceptions-0.10.3 Completed distributive-0.6 Starting contravariant-1.5.2 Building contravariant-1.5.2 Completed mmorph-1.1.3 Starting lens-family-2.0.0 Building lens-family-2.0.0 Completed exceptions-0.10.3 Starting monad-control-1.0.2.3 Completed primitive-0.7.0.0 Starting comonad-5.0.5 Building monad-control-1.0.2.3 Completed contravariant-1.5.2 Starting pipes-4.3.12 Building pipes-4.3.12 Completed lens-family-2.0.0 Starting errors-2.3.0 Building errors-2.3.0 Building comonad-5.0.5 Completed monad-control-1.0.2.3 Starting vector-0.12.0.3 Building vector-0.12.0.3 Completed errors-2.3.0 Starting scientific-0.3.6.2 Building scientific-0.3.6.2 Completed comonad-5.0.5 Starting bifunctors-5.5.5 Completed pipes-4.3.12 Starting pipes-safe-2.3.1 Building bifunctors-5.5.5 Building pipes-safe-2.3.1 Completed scientific-0.3.6.2 Starting pipes-parse-3.0.8 Building pipes-parse-3.0.8 Completed pipes-safe-2.3.1 Starting attoparsec-0.13.2.3 Completed pipes-parse-3.0.8 Building attoparsec-0.13.2.3 Completed bifunctors-5.5.5 Starting profunctors-5.4 Starting semigroupoids-5.3.3 Building profunctors-5.4 Building semigroupoids-5.3.3 Completed attoparsec-0.13.2.3 Starting pipes-attoparsec-0.5.1.5 Building pipes-attoparsec-0.5.1.5 Completed pipes-attoparsec-0.5.1.5 Completed profunctors-5.4 Completed semigroupoids-5.3.3 Starting free-5.1.2 Building free-5.1.2 Completed vector-0.12.0.3 Starting vector-builder-0.3.7.2 Starting vector-th-unbox-0.2.1.6 Building vector-th-unbox-0.2.1.6 Building vector-builder-0.3.7.2 Completed vector-th-unbox-0.2.1.6 Starting math-functions-0.3.2.0 Building math-functions-0.3.2.0 Completed vector-builder-0.3.7.2 Completed math-functions-0.3.2.0 Starting mwc-random-0.14.0.0 Building mwc-random-0.14.0.0 Completed free-5.1.2 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 mwc-random-0.14.0.0 Starting foldl-1.4.5 Building foldl-1.4.5 Completed pipes-bytestring-2.1.6 Completed foldl-1.4.5 Downloading sequence-formats-1.4.0 Downloaded sequence-formats-1.4.0 Starting sequence-formats-1.4.0 Building sequence-formats-1.4.0 Completed sequence-formats-1.4.0