with import "${builtins.getEnv "_NIX_TEST_BUILD_DIR"}/config.nix"; rec { a = mkDerivation { name = "nar-index-a"; builder = builtins.toFile "builder.sh" '' mkdir $out mkdir $out/foo touch $out/foo-x touch $out/foo/bar touch $out/foo/baz touch $out/qux mkdir $out/zyx cat >$out/foo/data <