Update nixpkgs pins #3422

Job	Run time
nix-build	3m 21s
runghc	1m 29s
unit-tests	12s
maintainer-scripts	9s
tests-benchmarks	13s
cabal	1m 18s
plan-extra-hackages	14s
build-extra-hackages	11s
shellFor-single-package	30s
cabal-doExactConfig	13s
multi-target	41s
shellFor-hoogle	17s
shellFor-multiple-package	19s
shellFor-not-depends	24s
closure-size	9s
update-docs	8s
check-path-support	13s
check-materialization-concurrency	23s
hydra-without-remote-builders-ghc967	25s
hix	1m 23s
haskell-nix-roots-do-not-require-IFDs	1m 42s
hydra-without-remote-builders-ghc9102	10s
hydra-ifdLevel-0-and-1	3m 53s
hix-cabal	18s
check-nix-tools	19s
docs	41s
hydra-ifdLevel-3	27m 13s
hydra-ifdLevel-2	20m 18s
	1h 6m 46s

Provide feedback