-rsync -a --include '*/' --include '*.robot' --exclude '*' ../../../resources/libraries/robot/ ${WORKING_DIR}/resources/libraries/robot/
-rsync -a --include '*/' --include '*.robot' --exclude '*' ../../../tests/ ${WORKING_DIR}/tests/
+from_dir="../../../resources/libraries/robot/"
+to_dir="${WORKING_DIR}/resources/libraries/robot/"
+${command} --include '*.robot' --exclude '*' "${from_dir}" "${to_dir}"
+from_dir="../../../tests/"
+to_dir="${WORKING_DIR}/tests/"
+${command} --include '*.robot' --exclude '*' "${from_dir}" "${to_dir}"