curve25519-dalek-derive is used at run time in 2,861 crates (of which 2,861 optionally). It is a direct run-time dependency in 5 crates. It's used only as a dev dependency in 111 crates.

Depender (with downloads and own rev deps) curve25519-dalek-derive version
2.5M 304 curve25519-dalek ^0.1
700 2 curve25519-dalek-ml ^0.1
1 tari-curve25519-dalek ^0.1
1 curve25519-elligator2 ^0.1.1
1 curve25519-dalek-v2 ^0.1