Bump nixpkgs pins #3088

Job	Run time
cabal-doExactConfig	1m 5s
build-extra-hackages	1h 15m 47s
cabal	24s
hix	1h 6m 58s
multi-target	59s
nix-build	1m 12s
maintainer-scripts	9s
plan-extra-hackages	41s
runghc	13s
shellFor-hoogle	13s
shellFor-multiple-package	14s
shellFor-not-depends	13s
shellFor-single-package	13s
tests-benchmarks	8s
unit-tests	9s
check-materialization-concurrency	21s
check-path-support	1h 4m 0s
closure-size	3s
docs	9m 37s
haskell-nix-roots-do-not-require-IFDs	1h 14m 19s
hix-cabal	1h 4m 20s
hydra-ifdLevel-0-and-1	25s
hydra-ifdLevel-2	11s
hydra-ifdLevel-3	11s
hydra-without-remote-builders-ghc9102	46s
hydra-without-remote-builders-ghc967	28s
nix-tools	1m 33s
update-docs	8s
	6h 5m 0s

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