Fix for HPUX, IOS and IRIX #3209

Job	Run time
nix-build	3m 7s
runghc	35s
tests-benchmarks	54s
shellFor-single-package	33s
unit-tests	9s
shellFor-multiple-package	1m 6s
build-extra-hackages	30s
cabal	54s
cabal-doExactConfig	12s
plan-extra-hackages	10s
multi-target	13s
maintainer-scripts	9s
shellFor-not-depends	22s
shellFor-hoogle	12s
check-materialization-concurrency	24s
update-docs	8s
check-path-support	20s
hydra-without-remote-builders-ghc967	4m 19s
hix-cabal	3m 1s
hydra-ifdLevel-3	30m 18s
hydra-ifdLevel-0-and-1	3m 29s
hix	1m 1s
haskell-nix-roots-do-not-require-IFDs	1m 54s
docs	2m 24s
check-nix-tools	1m 27s
hydra-without-remote-builders-ghc9102	14s
hydra-ifdLevel-2	8m 49s
closure-size	7s
	1h 7m 1s

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