solana-nostd-sha256 is used at run time in 4 crates (of which 1 optionally). It is a direct run-time dependency in 2 crates.

Depender (with downloads and own rev deps) solana-nostd-sha256 version
1 solana-hmac-sha256 ^0.1.3
380 solana-secp256k1-schnorr optional ^0.1.3