first make select list item P7_BUILD_OPTION
that will contain all Build Option available for your APP
use this code as source
select patch_name||' ('||wwv_flow_lang.system_message(patch_status)||')' d, id r
from APEX_200200.wwv_flow_patches where FLOW_ID = :APP_ID
BEGIN
UPDATE APEX_200200.wwv_flow_steps -
SET REQUIRED_PATCH = :P7_BUILD_OPTION
WHERE FLOW_ID = :P7_FLOW_ID
and ID = :P7_STEP_ID ;
end;
thanks