Update nixpkgs pins #2577

Job	Run time
cabal	14s
build-extra-hackages	11s
check-materialization-concurrency	28s
cabal-doExactConfig	44m 46s
check-path-support	45m 23s
closure-size	8s
haskell-nix-roots-do-not-require-IFDs	26m 23s
docs	3m 34s
hix	1h 8m 8s
hydra-ifdLevel-0-and-1	5m 44s
hydra-ifdLevel-2	2m 0s
hix-cabal	6s
hydra-ifdLevel-3	1m 56s
hydra-without-remote-builders-ghc8107	14s
hydra-without-remote-builders-ghc9101	15s
maintainer-scripts	12s
multi-target	37s
nix-build	28s
nix-tools	21s
plan-extra-hackages	7s
runghc	13s
shellFor-hoogle	9s
shellFor-multiple-package	46m 56s
shellFor-not-depends	25s
shellFor-single-package	32s
tests-benchmarks	16s
unit-tests	9s
update-docs	9s
	4h 10m 4s

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