1make: Bad modifier ":OX" for variable "NUMBERS"
2make: "varmod-order.mk" line 13: Undefined variable "${NUMBERS:OX"
3make: Bad modifier ":OxXX" for variable "NUMBERS"
4make: "varmod-order.mk" line 16: Undefined variable "${NUMBERS:Ox"
5make: Fatal errors encountered -- cannot continue
6make: stopped in unit-tests
7exit status 1
8