Me: what happens if you type 'echo PATH'? Pipe it to a file and send it to me
Collaborator: *sends me a 17,238 character text file of their PATH contents*

Me: that's no PATH; that's a space station

Holy crap, how? Mind posting more info?

@andunai there were multiple versions of software under different paths, paths going to a downloads folder, paths going to different drives, and basically paths to anywhere you could think to put a bin directory! You can totally see it happening though: just keep adding stuff to the PATH until it works, and then moving on with your day ...