Just curious, since you're handy to ask: How do the judges view code that depends on external (but cross-platform and FOSS) libraries? Only Xlib is specifically mentioned in the rules.
I'm specifically thinking of libpng, but I'm sure one could think of other meaningful examples.
Aside: history...
Larry Wall wrote the original Perl in 1986-87, the same two successive years he won the IOCCC. I hope this program helps you to realize that this was no fluke - that Perl and Obfuscation are as inseparable as, say, camels and humps.
Generally we don't like lots of external dependencies. External libraries do change over time - would such an entry work 10 years from now? The judges do use and test the entries using different operating systems. What will operating systems look like in 10 years?
Having said that :-), if the entry has merit on its own and not just because of the external dependency, then it might "win".
I'm specifically thinking of libpng, but I'm sure one could think of other meaningful examples.