: undefined 
make: in target "unclosed-expression": Unclosed variable "UNCLOSED"
: unclosed-expression 
make: in target "unclosed-modifier": while evaluating variable "UNCLOSED" with value "": Unclosed expression, expecting '}'
: unclosed-modifier 
make: in target "unknown-modifier": while evaluating variable "UNKNOWN" with value "": Unknown modifier "Z"
: unknown-modifier 
: end
exit status 2