riscv-pac is used at run time in 85 crates (of which 60 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) riscv-pac version
72K 93 riscv ^0.2.0
15K 34 riscv-rt ^0.2.0
700 1 riscv-peripheral ^0.2.0