mdbook_fork4ls is used at run time in 4 crates. It is a direct run-time dependency in 3 crates.

Depender (with downloads and own rev deps) mdbook_fork4ls version
1.5K mdbook-katex ^0.4.41
140 1 mdbook_incremental_preview ^0.4.41
mdbook_header_footer ^0.4.40