Fix gh-pages update #3115

Job	Run time
cabal	16s
nix-build	5m 5s
runghc	27s
unit-tests	11s
cabal-doExactConfig	29s
hix	1m 3s
maintainer-scripts	8s
multi-target	47s
plan-extra-hackages	8s
shellFor-hoogle	18s
shellFor-multiple-package	23s
shellFor-not-depends	28s
tests-benchmarks	13s
shellFor-single-package	29s
build-extra-hackages	10s
check-materialization-concurrency	20s
check-path-support	7s
closure-size	3s
docs	7m 55s
haskell-nix-roots-do-not-require-IFDs	18s
hydra-ifdLevel-0-and-1	3m 27s
hydra-ifdLevel-2	4m 42s
hydra-ifdLevel-3	30m 9s
hydra-without-remote-builders-ghc9102	1m 28s
hydra-without-remote-builders-ghc967	5m 16s
update-docs	9s
hix-cabal	18s
nix-tools	21s
	1h 5m 8s

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