mkTopLevEnv: not interpreted main:Main

[Chris Smith]

Thanks everyone for the help!

I'm working now on reproducing this with HEAD, and if I do, I'll write a
ticket.  On the other hand, it only seems to be an issue when one is
recompiling a file within one second of the first attempt, and Felipe's
workaround of deleting the .hi and .o files fixes it even then.  I can't
imagine recompiling a file multiple times per second is a common use
case, so this is probably low priority!

-- 
Chris