Resolving dependencies...
Configuring yi-0.6.7.0...
Failed to install yi-0.6.7.0
Build log ( /home/builder/.cabal/logs/yi-0.6.7.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-28475/yi-0.6.7.0'
Configuring yi-0.6.7.0...
Warning: 'ghc-options: -prof' is not necessary and will lead to problems when
used on a library. Use the configure flag --enable-library-profiling and/or
--enable-profiling.
cabal: The program 'alex' version >=3.0.3 && <=3.0.5 is required but the
version found at /home/builder/.cabal/bin/alex is version 3.1.7
cabal: Leaving directory '/tmp/cabal-tmp-28475/yi-0.6.7.0'
cabal: Error: some packages failed to install:
yi-0.6.7.0 failed during the configure step. The exception was:
ExitFailure 1