Add nixpkgs-2505 #3171

Job	Run time
multi-target	44s
cabal-doExactConfig	22s
nix-build	2m 0s
cabal	15s
runghc	13s
unit-tests	13s
build-extra-hackages	15s
docs	58s
hix	49s
maintainer-scripts	13s
plan-extra-hackages	14s
shellFor-hoogle	25s
shellFor-multiple-package	29s
shellFor-not-depends	32s
shellFor-single-package	41s
check-materialization-concurrency	27s
check-path-support	11s
closure-size	9s
haskell-nix-roots-do-not-require-IFDs	21s
hix-cabal	14s
hydra-ifdLevel-0-and-1	8m 51s
hydra-ifdLevel-2	20m 24s
hydra-ifdLevel-3	30m 16s
hydra-without-remote-builders-ghc9102	1m 21s
hydra-without-remote-builders-ghc967	1m 39s
nix-tools	7m 0s
tests-benchmarks	14s
update-docs	8s
	1h 19m 38s

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