-out << "@def $SSH_SOURCES = (#{ssh4allowed.join(' ')});"
-out << "@def $SSH_V6_SOURCES = (#{ssh6allowed.join(' ')});"
+out << "@def $SSH_SOURCES = ( $SSH_SOURCES #{ssh4allowed.join(' ')});"
+out << "@def $SSH_V6_SOURCES = ( $SSH_V6_SOURCES #{ssh6allowed.join(' ')});"