It's used only as a dev dependency in 9 crates.

Depender (with downloads and own rev deps) heim-derive version
480 8 heim dev ^0.0.10
410 2 heim-cpu dev ^0.0.10
350 2 heim-host dev ^0.0.10
160 2 heim-net dev ^0.0.10
130 1 heim-disk dev ^0.0.10
120 1 heim-memory dev ^0.0.10
100 1 heim-process dev ^0.0.10
100 1 heim-sensors dev ^0.0.10
1 heim-virt dev ^0.0.10