bb.data_smart.ExpansionError: Failure expanding variable root_prefix, expression was ${@bb.utils.contains('DISTRO_FEATURES', 'usrmerge', '/opt/MyOS/${@'${DISTRO_VERSION}'.replace('snapshot-20181106','snapshot')}/sysroots/x86_64-mysdk-linux/usr', '/opt/MyOS/${@'${DISTRO_VERSION}'.replace('snapshot-20181106','snapshot')}/sysroots/x86_64-mysdk-linux', d)} which triggered exception SyntaxError: invalid syntax (root_prefix, line 1)