clone-solana-system-transaction is used at run time in 3 crates (of which 2 optionally). It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) clone-solana-system-transaction version
150 clone-solana-faucet =2.2.1
170 18 clone-solana-sdk optional ^2.2.1
170 4 clone-solana-perf optional ^2.2.1
190 4 clone-solana-rpc-client dev ^2.2.1
160 1 clone-solana-transaction-metrics-tracker dev ^2.2.1
160 4 clone-solana-runtime-transaction dev ^2.2.1
150 3 clone-solana-svm dev ^2.2.1
150 1 clone-solana-cost-model dev ^2.2.1