Is thre a way to do an "if" on "use lib"?

[ToddAndMargo via perl6-users]

Hi All,

Is there a way to do an "if" on "use lib", so
I do not have to keep commenting these back and forth?

# use lib 'C:/NtUtil', '.';
use lib 'C:/NtUtil', '.', 'K:/NtUtil';

Many thanks,
-T