Add support for static nix-tools #1966

Job	Run time
nix-build	40m 11s
runghc	13s
cabal-doExactConfig	11s
cabal	13s
tests-benchmarks	10s
unit-tests	10s
build-extra-hackages	5s
docs	26s
hix	21s
hydra-ifdLevel-0-and-1	12s
maintainer-scripts	7s
hydra-ifdLevel-2	7s
multi-target	12s
plan-extra-hackages	8s
shellFor-hoogle	7s
shellFor-multiple-package	15s
shellFor-single-package	14s
shellFor-not-depends	11s
check-materialization-concurrency	22s
check-path-support	5s
closure-size	5s
haskell-nix-roots-do-not-require-IFDs	5s
hix-cabal	18s
hydra-ifdLevel-3-and-ghc-8-10	7s
hydra-ifdLevel-3-and-ghc-9-2	7s
hydra-ifdLevel-3-and-not-ghc-8-10-or-9-2	6s
hydra-without-remote-builders	23s
nix-tools	6s
update-docs	4s
	45m 21s

Provide feedback