The problem is use demands a string, not a variable. Try replacing the use line with:

require "$X.pm";
$X->import;
[download]

That is now a run-time directive (instead of use being a compile-time directive) so you don't need the BEGIN block anymore. :-)

------
We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.