libghc-hslogger-dev 1.1.4+dfsg1-2 (amd64 binary) in ubuntu precise

 hslogger is a logging framework for Haskell, roughly similar to
 Python's logging module.
 .
 hslogger lets each log message have a priority and source be associated
 with it. The programmer can then define global handlers that route
 or filter messages based on the priority and source. hslogger also
 has a syslog handler built in.