$ perl Makefile.PL
Checking if your kit is complete...
Looks good
Warning: prerequisite Bit::Vector failed to load: Can't locate Bit/Vector.pm in
@INC (@INC contains: c:/Perl/lib c:/Perl/site/lib .) at (eval 4) line 3.
Writing Makefile for Date::Calc
Writing patchlevel.h for c:\Perl\bin\perl.exe (5.006001)