clone-solana-instructions-sysvar is used at run time in 2 crates. It's used only as a dev dependency in 3 crates (of which 1 directly).

Depender (with downloads and own rev deps) clone-solana-instructions-sysvar version
1 clone-solana-program ^2.2.1
2 clone-solana-sysvar ^2.2.1
1 clone-solana-secp256k1-program dev ^2.2.1