tectonic_xetex_layout is used at run time in 19 crates (of which 6 optionally). It is a direct run-time dependency in 2 crates.

Depender (with downloads and own rev deps) tectonic_xetex_layout version
650 20 tectonic >=0.1.0, <1
550 1 tectonic_engine_xetex >=0.2.1, <1