expat-sys is used at run time in 72 crates (of which 66 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) expat-sys version
10K 2 servo-fontconfig-sys ^2.1.0
180 servo-skia ^2.1.5
skia ^2.1.0