refactor derivatives #292

Job	Run time
Lint	5m 22s
Test (macOS-latest, x86_64-apple-darwin)	12m 16s
Test (ubuntu-20.04, x86_64-unknown-linux-gnu)	15m 31s
Test (windows-2022, x86_64-pc-windows-msvc)	18m 53s
cargo-deny	1m 13s
Test (ubuntu-20.04, aarch64-linux-android, x86_64-unknown-linux-gnu)	8m 35s
test_success	0s
	1h 1m 50s

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