hmac-drbg is used at run time in 186 crates (of which 177 optionally, 2 directly). It's used at build time in 1 crate (of which 1 optionally, 0 directly). It's used only as a dev dependency in 1 crate.

Number of dependershmac-drbg versionDownloads/month
0 0.3.0 440
143 0.2.0 40K
45 0.1.2 2.4K
Depender (with downloads and own rev deps) hmac-drbg version
43K 37 libsecp256k1 optional ^0.2
libsecp256k1-rs ^0.1