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 base64-bytestring-1.0.0.2 Starting base-orphans-0.8.1 Starting StateVar-1.2 Starting base-compat-0.11.0 Building base64-bytestring-1.0.0.2 Building StateVar-1.2 Building base-orphans-0.8.1 Building base-compat-0.11.0 Completed base-orphans-0.8.1 Starting blaze-builder-0.4.1.0 Completed StateVar-1.2 Starting cabal-doctest-1.0.7 Building blaze-builder-0.4.1.0 Building cabal-doctest-1.0.7 Completed base64-bytestring-1.0.0.2 Starting call-stack-0.2.0 Building call-stack-0.2.0 Completed call-stack-0.2.0 Starting config-value-0.7.0.0 Failed to install config-value-0.7.0.0 Build log ( /home/builder/.cabal/logs/ghc-8.6.3/config-value-0.7.0.0-EyBlYNDXrSK1yXdt9aP9SC.log ): cabal: Entering directory '/tmp/cabal-tmp-3057/config-value-0.7.0.0' Configuring config-value-0.7.0.0... cabal: The program 'happy' version ^>=1.19.12 is required but the version found at /home/builder/.cabal/bin/happy is version 1.19.9 cabal: Leaving directory '/tmp/cabal-tmp-3057/config-value-0.7.0.0' Starting hashable-1.2.7.0 Completed cabal-doctest-1.0.7 Completed blaze-builder-0.4.1.0 Building hashable-1.2.7.0 Completed base-compat-0.11.0 Completed hashable-1.2.7.0 cabal: Error: some packages failed to install: config-schema-1.2.0.0-E02JkYgO1Z71T95bdPl9f4 depends on config-schema-1.2.0.0 which failed to install. config-value-0.7.0.0-EyBlYNDXrSK1yXdt9aP9SC failed during the configure step. The exception was: ExitFailure 1 glirc-2.33-359bgfHbOdSLvBOd86OMbO depends on glirc-2.33 which failed to install.