I wonder how long it would take them to figure it out. Bonus point if it is a two stage, where the compiler contains the real logic but some innocent tool looks like it is the culprit. And of course per the original you modify the compiler in such a way that an attempt to recompile it will reinstall the gimmick. And maybe redirect the distribution downloader to the point that it uses a locally cached devtools copy that ... you get the idea...