It's used at build time in 47 crates (of which 4 optionally, 11 directly).

Depender (with downloads and own rev deps) readme-rustdocifier version
40K 4 moosicbox_audiotags build ^0.1.0
21K reed-solomon-simd build ^0.1.0
5.4K ocsp-stapler build ^0.1.0
1.4K 13 audiotags build ^0.1.1
950 3 k-lock build ^0.1
280 sensible build ^0.1
230 1 reed-solomon-16 build ^0.1.0
audiotags2 build ^0.1.0
x64 build ^0.1.0
ml-progress build ^0.1.1
ml-downloader build ^0.1.1