Resolving dependencies...
Downloading  alex-3.2.7
Downloaded   alex-3.2.7
Starting     alex-3.2.7
Building     alex-3.2.7
Completed    alex-3.2.7
Warning: could not create a symlink in /home/builder/.cabal/bin for alex
because the file exists there already but is not managed by cabal. You can
create a symlink for this executable manually if you wish. The executable file
has been installed at
/home/builder/hackage-server/build-cache/tmp-install/bin/alex