Sandbox friendly build #159

Job	Run time
rustfmt	23s
build (ubuntu-latest, stable)	1m 0s
clippy (ubuntu-latest, stable)	1m 3s
build (ubuntu-latest, nightly)	1m 2s
clippy (ubuntu-latest, nightly)	50s
build (windows-latest, stable)	4m 43s
clippy (windows-latest, stable)	2m 42s
build (windows-latest, nightly)	3m 40s
clippy (windows-latest, nightly)	3m 20s
build (macos-latest, stable)	1m 21s
clippy (macos-latest, stable)	1m 20s
build (macos-latest, nightly)	1m 20s
clippy (macos-latest, nightly)	1m 23s
	24m 7s

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