Um because it has depedency issues. Maybe a library isn't installed, or whatever it's telling you. Without forcing or running it with the --no-deps options, it won't install because it will not run correctly all the time without the dependencies satisfied. Although, I just re-read your post, and see that you got the static version, so I don't know what other dependency issues you would have, so I am thinking now that this is why you are posing this question, and not wondering why you can install things by bypassing the deps checks.
Ok, well I would now go back and just not post this, but in the slight off chance that it answers you question, I will anyway.