passing a full path seems to work, despite the fact that the documentation says newContext :: Maybe String -> IO ContextSource Create a Context object. A path to the zone-info database may be specified. Otherwise, the TZDIR environment variable, or a reasonable default, will be used. An IOError will be thrown on failure. On Wed, Oct 20, 2010 at 10:40 PM, Anatoly Yakovenko wrote:

I am trying to figure out how to use this library, seems like this should work

Prelude Data.Time.ZoneInfo> ctx <- newContext Nothing Prelude Data.Time.ZoneInfo> name <- zoneInfoName (utcOlsonZone ctx) True Prelude Data.Time.ZoneInfo> newOlsonZone ctx name *** Exception: Data.Time.ZoneInfo.newOlsonZone: invalid argument (Invalid argument)

but it doesn't, neither does

Prelude Data.Time.ZoneInfo> newOlsonZone ctx "America/New_York" *** Exception: Data.Time.ZoneInfo.newOlsonZone: invalid argument (Invalid argument)

and my zoneinfo seems to be kosher on my machine

$ ls /usr/share/zoneinfo/America/New_York /usr/share/zoneinfo/America/New_York

$ ls /usr/share/zoneinfo/GMT /usr/share/zoneinfo/GMT

what am i missing?