This prevents the nix build copying the target/ dir into the store
whenever this is built through Nix.
Change-Id: I397228fd8e2e3265ed87d3400fe927bc505da090
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11496
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: picnoir picnoir <picnoir@alternativebit.fr>
