It's used at build time in 15 crates (of which 11 optionally, 3 directly).

Number of dependers risc0-build-kernel version Downloads/month
11 1.1.3 1.5K
0 1.1.2 8.5K
2 0.20.1 0
2 0.18.0 0
Depender (with downloads and own rev deps) risc0-build-kernel version
10K 1 risc0-circuit-recursion-sys build ^1.1.3
10K 1 risc0-circuit-rv32im-sys build ^1.1.3
10K 5 risc0-sys build ^1.1.3