Also see mozilla/sccache for Rust.
It has a number of features, combining capabilities of ccache/distcc/icecream for C, C++ and Rust...along with some unique things that I've not seen in other tools. My comment at https://news.ycombinator.com/item?id=25604249 has a summary.
distcc didn't for example handle the load balancing well in my experiments whereas icecream did much better on that front and thus resulting with noticeably shorter build times. icecream also comes with a nice GUI (icemon) which can come really handy, e.g. you can use it to observe the build jobs and debug when things go south.
But I didn't know that sccache also supports distributed builds. From your comment it seems as if this was a recentish addition. I wonder how polished it is but I will definitely give it a try at some moment.