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-8.6.1 ghci-8.6.1 ghc-8.6.1 ghc-boot-8.6.1 Continuing even though the plan contains dangerous reinstalls. Starting StateVar-1.1.1.1 Starting base-orphans-0.8 Building base-orphans-0.8 Building StateVar-1.1.1.1 Completed base-orphans-0.8 Starting base-prelude-1.3 Completed StateVar-1.1.1.1 Starting cabal-doctest-1.0.6 Building base-prelude-1.3 Building cabal-doctest-1.0.6 Completed cabal-doctest-1.0.6 Starting containers-0.5.11.0 Building containers-0.5.11.0 Completed base-prelude-1.3 Starting data-default-class-0.1.2.0 Building data-default-class-0.1.2.0 Completed data-default-class-0.1.2.0 Starting focus-1.0.1.2 Building focus-1.0.1.2 Completed focus-1.0.1.2 Starting primitive-0.6.4.0 Building primitive-0.6.4.0 Completed primitive-0.6.4.0 Starting semigroups-0.18.5 Building semigroups-0.18.5 Completed semigroups-0.18.5 Starting tagged-0.8.6 Building tagged-0.8.6 Completed tagged-0.8.6 Starting transformers-compat-0.6.2 Building transformers-compat-0.6.2 Completed transformers-compat-0.6.2 Starting contravariant-1.5 Building contravariant-1.5 Completed contravariant-1.5 Starting vector-0.12.0.1 Building vector-0.12.0.1 Completed containers-0.5.11.0 Starting distributive-0.6 Building distributive-0.6 Completed distributive-0.6 Starting transformers-base-0.4.5.2 Building transformers-base-0.4.5.2 Completed transformers-base-0.4.5.2 Starting mmorph-1.1.2 Building mmorph-1.1.2 Completed mmorph-1.1.2 Starting th-abstraction-0.2.8.0 Building th-abstraction-0.2.8.0 Completed th-abstraction-0.2.8.0 Starting cereal-0.5.7.0 Building cereal-0.5.7.0 Completed cereal-0.5.7.0 Starting binary-0.8.6.0 Building binary-0.8.6.0 Completed vector-0.12.0.1 Starting comonad-5.0.4 Building comonad-5.0.4 Completed binary-0.8.6.0 Starting monad-control-1.0.2.3 Building monad-control-1.0.2.3 Completed comonad-5.0.4 Starting vector-th-unbox-0.2.1.6 Completed monad-control-1.0.2.3 Starting vector-builder-0.3.6 Building vector-th-unbox-0.2.1.6 Building vector-builder-0.3.6 Completed vector-th-unbox-0.2.1.6 Starting text-1.2.3.1 Building text-1.2.3.1 Completed vector-builder-0.3.6 Starting bifunctors-5.5.3 Building bifunctors-5.5.3 Completed bifunctors-5.5.3 Starting list-t-1.0.1 Building list-t-1.0.1 Completed list-t-1.0.1 Starting math-functions-0.3.0.2 Building math-functions-0.3.0.2 Completed text-1.2.3.1 Starting profunctors-5.3 Building profunctors-5.3 Completed math-functions-0.3.0.2 Starting hashable-1.2.7.0 Building hashable-1.2.7.0 Completed profunctors-5.3 Starting mwc-random-0.14.0.0 Completed hashable-1.2.7.0 Starting unordered-containers-0.2.9.0 Building mwc-random-0.14.0.0 Building unordered-containers-0.2.9.0 Completed mwc-random-0.14.0.0 Completed unordered-containers-0.2.9.0 Starting semigroupoids-5.3.1 Building semigroupoids-5.3.1 Completed semigroupoids-5.3.1 Starting foldl-1.4.5 Building foldl-1.4.5 Completed foldl-1.4.5 Starting deferred-folds-0.9.9 Building deferred-folds-0.9.9 Completed deferred-folds-0.9.9 Starting primitive-extras-0.7.1 Building primitive-extras-0.7.1 Completed primitive-extras-0.7.1 Starting stm-hamt-1.2.0.2 Building stm-hamt-1.2.0.2 Completed stm-hamt-1.2.0.2 Starting stm-containers-1.1.0.2 Building stm-containers-1.1.0.2 Completed stm-containers-1.1.0.2 Downloading slave-thread-1.0.2.6 Downloaded slave-thread-1.0.2.6 Starting slave-thread-1.0.2.6 Building slave-thread-1.0.2.6 Completed slave-thread-1.0.2.6