Google open-source projects have a strong tendency toward not building outside of an internal Google build environment and they'll pretty much just be like, "Whups! Nobody works on this who doesn't work at Google, so we very commonly break the build." ChromiumOS suffers from this a lot and it's like, unclear that they are even really adhering to the licenses for the upstream FOSS they include and depend on, but who even has the time to challenge them?

Reminds me of the 90s when RedHat's source CD wouldn't actually build their binary distro, but since almost noone ever tries, almost noone cares.