Bump nix from 0.27.1 to 0.28.0 #2833

Job	Run time
Check (stable)	59s
Check (1.70.0)	1m 10s
Documentation	45s
Clippy	55s
Deny (advisories)	23s
Hack	1m 50s
Lint markdown files	48s
Tests	4m 4s
Format	6s
Deny (bans licenses sources)	21s
Cross (aarch64-linux-android)	2m 34s
Tools	2m 54s
Cross (aarch64-unknown-linux-gnu)	2m 39s
Cross (aarch64-unknown-linux-musl)	2m 27s
	21m 55s

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