Add support for static nix-tools #1996

Job	Run time
cabal	17m 21s
nix-build	4m 5s
runghc	17m 13s
unit-tests	28m 36s
cabal-doExactConfig	27m 50s
multi-target	17m 16s
shellFor-hoogle	17m 12s
shellFor-multiple-package	22s
shellFor-single-package	26m 42s
tests-benchmarks	23m 41s
build-extra-hackages	20s
docs	1m 9s
closure-size	11m 7s
hix	8m 49s
hydra-ifdLevel-2	1m 9s
hydra-ifdLevel-0-and-1	57s
hydra-ifdLevel-3-and-ghc-8-10	26s
hydra-ifdLevel-3-and-ghc-9-2	13s
hydra-ifdLevel-3-and-not-ghc-8-10-or-9-2	25s
maintainer-scripts	8m 36s
plan-extra-hackages	12s
shellFor-not-depends	15s
check-materialization-concurrency	24s
check-path-support	37s
haskell-nix-roots-do-not-require-IFDs	18s
hix-cabal	7m 8s
hydra-without-remote-builders	1m 9s
nix-tools	1m 49s
update-docs	5s
	3h 45m 26s

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