to-syn-value_derive is used at run time in 1 crate. It's used at build time in 3 crates (of which 1 optionally, 1 directly).

Depender (with downloads and own rev deps) to-syn-value_derive version
1.0K 1 to-syn-value ^0.1.1
650 2 scryer-prolog build ^0.1.1