Hello,
       I am building 6.8.3 from my "local" 6.8.2. However, I am getting errors in compiling one of the Main.hs. E.g. 
Main.hs:76:23:
    Ambiguous occurrence `flags'
    It could refer to either `Main.flags', defined at Main.hs:118:0
                          or `System.Posix.flags', imported from System.Posix at Main.hs:59:0-18
......
I did a "find . -name Main.hs" and there are several Main.hs. I am not sure which one is causing trouble or why. ??
Kind regards, Vasili