clone-solana-system-interface is used at run time in 2 crates (of which 2 optionally). It's used only as a dev dependency in 1 crate.

Depender clone-solana-system-interface version
clone-solana-loader-v3-interface optional ^1.0
clone-solana-loader-v4-interface optional ^1.0
clone-solana-bincode dev ^1.0