Two use lib's works. The directories are unshifted to @INC, when you call use lib.

perl -Mlib=/foo -Mlib=/bar -le 'print for @INC'
/bar
/foo
/etc/perl
...
[download]

You can also use lib qw(/bar /foo) for the same effect.

perl -Mlib=/bar,/foo -le 'print for @INC'
/bar
/foo
/etc/perl
...
[download]