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... Starting erf-2.0.0.0 Starting primitive-0.6.4.0 Building erf-2.0.0.0 Building primitive-0.6.4.0 Completed erf-2.0.0.0 Starting random-1.1 Building random-1.1 Completed random-1.1 Completed primitive-0.6.4.0 Starting tf-random-0.5 Building tf-random-0.5 Completed tf-random-0.5 Starting QuickCheck-2.12.6.1 Building QuickCheck-2.12.6.1 Completed QuickCheck-2.12.6.1 Downloading HCL-1.7 Downloaded HCL-1.7 Starting HCL-1.7 Building HCL-1.7 Completed HCL-1.7