It's used at build time in 11 crates (5 directly). It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) gmt-fem-code-builder version
260 5 gmt_dos-clients_fem build ^2.2
160 12 gmt_dos-clients_io build ^2.2
150 8 gmt-fem build ^2.2
130 4 gmt_dos-clients_mount build ^2.2
130 1 gmt_dos-clients_m2-ctrl build ^2.2