zcash_spec is used at run time in 13 crates (of which 1 optionally). It is a direct run-time dependency in 3 crates.

Depender (with downloads and own rev deps) zcash_spec version
33K 7 orchard ^0.1
28K 14 zcash_primitives ^0.1
10K 6 sapling-crypto ^0.1