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

Depender (with downloads and own rev deps) heim-derive version
950 7 heim dev ^0.0.10
600 2 heim-host dev ^0.0.10
550 2 heim-cpu dev ^0.0.10
420 1 heim-memory dev ^0.0.10
380 1 heim-sensors dev ^0.0.10
360 2 heim-net dev ^0.0.10
310 1 heim-disk dev ^0.0.10
250 1 heim-process dev ^0.0.10
190 1 heim-virt dev ^0.0.10