Bump nixpkgs pins #3079

Job	Run time
cabal-doExactConfig	52m 30s
multi-target	57m 19s
nix-build	1h 15m 4s
cabal	53m 25s
runghc	53m 22s
shellFor-hoogle	56m 54s
shellFor-multiple-package	57m 25s
shellFor-single-package	44m 28s
tests-benchmarks	17s
unit-tests	13s
build-extra-hackages	13s
check-materialization-concurrency	28s
closure-size	10s
check-path-support	38s
docs	1m 3s
haskell-nix-roots-do-not-require-IFDs	22s
hix	1m 41s
hix-cabal	4m 46s
hydra-ifdLevel-0-and-1	28s
hydra-ifdLevel-2	14s
hydra-ifdLevel-3	23s
hydra-without-remote-builders-ghc9102	2m 0s
hydra-without-remote-builders-ghc967	3m 26s
maintainer-scripts	10s
plan-extra-hackages	10s
nix-tools	16s
shellFor-not-depends	24s
update-docs	12s
	7h 48m 1s

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