push @storePaths, $build->outpath;

	    push @storePaths, $build->outpath;

        # Put the system type in the manifest (for top-level paths) as
	# a hint to the binary patch generator.  (It shouldn't try to
	# generate patches between builds for different systems.)  It
	# would be nice if Nix stored this info for every path but it
	# doesn't.
	$c->stash->{systemForPath}->{$build->outpath} = $build->system;

        my $system = $c->stash->{systemForPath}->{$path};

            (defined $system ? "  System: $system\n" : "") .