rustup-toolchain is used at run time in 3 crates (of which 1 optionally). It's used only as a dev dependency in 4 crates.

Depender (with downloads and own rev deps) rustup-toolchain version
180 cargo-hax ^0.1
hax-subcommands ^0.1
neo4j optional ^0.1.6
188K 236 syntect dev ^0.1.5
3.0K 3 rustic_core dev ^0.1.7
1.1K cargo-public-api dev ^0.1.7
1 organize-rs_core dev ^0.1.4