> The total size of the compressed file and decompressor (as a Win32 or Linux executable) must not be larger than 99% of the previous prize winning entry. Emph

> The total size of the compressed file and decompressor (as a Win32 or Linux executable) must not be larger than 99% of the previous prize winning entry. Emphasis mine. You can make a highly specific compressor, but it'll need a highly specific decompressor, which will count against your score. In essence the competition is "create the smallest executable which produces enwiki9 as its output".