Bump nixpkgs pins #3081

Job	Run time
cabal	13s
nix-build	2h 29m 41s
runghc	12s
cabal-doExactConfig	2m 45s
multi-target	36s
shellFor-multiple-package	23m 13s
shellFor-hoogle	14s
shellFor-not-depends	22s
shellFor-single-package	21s
tests-benchmarks	9s
unit-tests	5s
build-extra-hackages	8s
check-materialization-concurrency	20s
check-path-support	22s
closure-size	3s
docs	40s
haskell-nix-roots-do-not-require-IFDs	21s
hix	48s
hix-cabal	3m 51s
hydra-ifdLevel-0-and-1	11s
hydra-ifdLevel-2	11s
hydra-ifdLevel-3	30s
hydra-without-remote-builders-ghc9102	42s
hydra-without-remote-builders-ghc967	35s
maintainer-scripts	14s
nix-tools	6m 39s
plan-extra-hackages	8s
update-docs	5s
	3h 13m 39s

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