private PBXTarget toXCTestPbxTarget(XcodeTarget xcodeTarget) {
        PBXShellScriptBuildPhase hackBuildPhase = new PBXShellScriptBuildPhase();
        hackBuildPhase.setShellPath("/bin/sh");
        hackBuildPhase.setShellScript("# Script to generate specific Swift files Xcode expects when running tests.\n"
            + "set -eu\n"
            + "ARCH_ARRAY=($ARCHS)\n"
            + "SUFFIXES=(swiftdoc swiftmodule h)\n"