https://blog.rust-lang.org/2018/02/15/Rust-1.24.html
#rustlang 1.24 stable has incremental compilation. you know what you must do
@a_breakin_glass you'll need to update the stable branch to use 1.24 stable. i don't like using nightly much personally but one assumes they've had this feature for a minute as it's been tested and refined