Bump nixpkgs pins #3082

Job	Run time
cabal-doExactConfig	4m 14s
cabal	2m 38s
build-extra-hackages	1m 6s
docs	20m 11s
hix	2m 43s
hydra-ifdLevel-0-and-1	29s
hydra-ifdLevel-2	19s
hydra-ifdLevel-3	11s
maintainer-scripts	22s
multi-target	2m 56s
nix-build	24m 15s
plan-extra-hackages	43s
runghc	13s
shellFor-hoogle	5m 5s
shellFor-multiple-package	32s
shellFor-not-depends	47s
shellFor-single-package	37s
tests-benchmarks	25s
unit-tests	8s
check-materialization-concurrency	27s
check-path-support	45s
closure-size	6s
haskell-nix-roots-do-not-require-IFDs	1m 57s
hix-cabal	28s
hydra-without-remote-builders-ghc9102	4m 26s
hydra-without-remote-builders-ghc967	7m 33s
nix-tools	27s
update-docs	8s
	1h 24m 11s

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