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 primitive-0.6.4.0 Building primitive-0.6.4.0 Completed primitive-0.6.4.0 Starting vector-0.12.0.2 Building vector-0.12.0.2 Completed vector-0.12.0.2 Starting re2-0.3 Failed to install re2-0.3 Build log ( /home/builder/.cabal/logs/ghc-8.6.1/re2-0.3-DjqdfOYzdc14luJECO74NW.log ): cabal: Entering directory '/tmp/cabal-tmp-10482/re2-0.3' Configuring re2-0.3... cabal: Missing dependency on a foreign library: * Missing (or bad) C library: re2 This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is.If the library file does exist, it may contain errors that are caught by the C compiler at the preprocessing stage. In this case you can re-run configure with the verbosity flag -v3 to see the error messages. cabal: Leaving directory '/tmp/cabal-tmp-10482/re2-0.3' cabal: Error: some packages failed to install: re2-0.3-DjqdfOYzdc14luJECO74NW failed during the configure step. The exception was: ExitFailure 1