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 shine-examples-0.1 Building shine-examples-0.1 Failed to install shine-examples-0.1 Build log ( /home/builder/.cabal/logs/ghc-8.6.3/shine-examples-0.1-3yEuGWsPbUcC8aHSYgxS7F.log ): cabal: Entering directory '/tmp/cabal-tmp-7746/shine-examples-0.1' Configuring shine-examples-0.1... Building shine-examples-0.1... Warning: No documentation was generated as this package does not contain a library. Perhaps you want to use the --executables, --tests, --benchmarks or --foreign-libraries flags. cabal: No executables and no library found. Nothing to do. cabal: Leaving directory '/tmp/cabal-tmp-7746/shine-examples-0.1' cabal: Error: some packages failed to install: shine-examples-0.1-3yEuGWsPbUcC8aHSYgxS7F failed during the final install step. The exception was: ExitFailure 1