Ambiguous Occurrence errors when built alongside time-1.9.1

[aeggenberger]

I get several errors like this and a build failure when trying to build time-recurrence in the same sandbox as time-1.9.1.

src/Data/Time/CalendarTime/CalendarTime.hs:50:31:
    Ambiguous occurrence ‘calendarYear’
    It could refer to either ‘Data.Time.CalendarTime.CalendarTime.calendarYear’,
                             defined at src/Data/Time/CalendarTime/CalendarTime.hs:31:7
                          or ‘Data.Time.calendarYear’,
                             imported from ‘Data.Time’ at src/Data/Time/CalendarTime/CalendarTime.hs:17:1-16
                             (and originally defined in ‘time-1.9.1:Data.Time.Calendar.CalendarDiffDays’)`