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 StateVar-1.2 Starting co-log-core-0.2.1.0 Starting base-orphans-0.8.1 Starting base-compat-0.11.0 Building co-log-core-0.2.1.0 Building base-orphans-0.8.1 Building StateVar-1.2 Building base-compat-0.11.0 Completed base-orphans-0.8.1 Starting colour-2.3.5 Completed StateVar-1.2 Starting dlist-0.8.0.7 Building colour-2.3.5 Building dlist-0.8.0.7 Completed co-log-core-0.2.1.0 Starting hashable-1.3.0.0 Building hashable-1.3.0.0 Completed dlist-0.8.0.7 Starting integer-logarithms-1.0.3 Building integer-logarithms-1.0.3 Completed hashable-1.3.0.0 Starting primitive-0.7.0.0 Completed integer-logarithms-1.0.3 Starting random-1.1 Building primitive-0.7.0.0 Completed base-compat-0.11.0 Starting semigroups-0.19.1 Building random-1.1 Building semigroups-0.19.1 Completed colour-2.3.5 Starting tagged-0.8.6 Building tagged-0.8.6 Completed semigroups-0.19.1 Starting th-abstraction-0.3.1.0 Building th-abstraction-0.3.1.0 Completed random-1.1 Starting torsor-0.1 Building torsor-0.1 Completed tagged-0.8.6 Starting time-compat-1.9.2.2 Building time-compat-1.9.2.2 Completed torsor-0.1 Starting contravariant-1.5.2 Building contravariant-1.5.2 Completed th-abstraction-0.3.1.0 Starting unordered-containers-0.2.10.0 Building unordered-containers-0.2.10.0 Completed contravariant-1.5.2 Starting ansi-terminal-0.10.2 Completed time-compat-1.9.2.2 Starting uuid-types-1.0.3 Building ansi-terminal-0.10.2 Building uuid-types-1.0.3 Completed primitive-0.7.0.0 Starting vector-0.12.0.3 Building vector-0.12.0.3 Completed uuid-types-1.0.3 Starting scientific-0.3.6.2 Completed ansi-terminal-0.10.2 Building scientific-0.3.6.2 Completed unordered-containers-0.2.10.0 Completed scientific-0.3.6.2 Starting attoparsec-0.13.2.3 Building attoparsec-0.13.2.3 Completed attoparsec-0.13.2.3 Completed vector-0.12.0.3 Starting typerep-map-0.3.2 Starting aeson-1.4.6.0 Building typerep-map-0.3.2 Building aeson-1.4.6.0 Completed typerep-map-0.3.2 Completed aeson-1.4.6.0 Starting chronos-1.1 Building chronos-1.1 Completed chronos-1.1 Starting co-log-0.4.0.0 Building co-log-0.4.0.0 Failed to install co-log-0.4.0.0 Build log ( /home/builder/.cabal/logs/ghc-8.6.3/co-log-0.4.0.0-AzHATm1wVou2nwrFIu9EXh.log ): cabal: Entering directory '/tmp/cabal-tmp-18439/co-log-0.4.0.0' Configuring co-log-0.4.0.0... Preprocessing library for co-log-0.4.0.0.. Building library for co-log-0.4.0.0.. [1 of 9] Compiling Colog.Concurrent.Internal [2 of 9] Compiling Colog.Concurrent [3 of 9] Compiling Colog.Contra [4 of 9] Compiling Colog.Monad [5 of 9] Compiling Colog.Message [6 of 9] Compiling Colog.Actions [7 of 9] Compiling Colog.Pure [8 of 9] Compiling Colog.Rotation [9 of 9] Compiling Colog Preprocessing executable 'concurrent-playground' for co-log-0.4.0.0.. Building executable 'concurrent-playground' for co-log-0.4.0.0.. [1 of 1] Compiling Main Linking dist/build/concurrent-playground/concurrent-playground ... Preprocessing executable 'play-colog' for co-log-0.4.0.0.. Building executable 'play-colog' for co-log-0.4.0.0.. [1 of 1] Compiling Main Linking dist/build/play-colog/play-colog ... Preprocessing executable 'readme' for co-log-0.4.0.0.. Building executable 'readme' for co-log-0.4.0.0.. ghc: could not execute: markdown-unlit cabal: Leaving directory '/tmp/cabal-tmp-18439/co-log-0.4.0.0' cabal: Error: some packages failed to install: co-log-0.4.0.0-AzHATm1wVou2nwrFIu9EXh failed during the building phase. The exception was: ExitFailure 1