system-call is used at run time in 8 crates (of which 1 optionally, 6 directly). It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) system-call version
210 5 unix ^0.1
170 6 null-terminated dev ^0.1
1 cursebox ^0.1.2
2 tempus optional ^0.1
1 unix-signal ^0.1.2
2 unix-tty ^0.1
user-sync ^0.1