1make: In the :@ modifier, the variable name "${:Ubar:S,b,v,}" must not contain a dollar 2 while evaluating variable "VAR" with value "value" 3 in command "@echo ${VAR:Uvalue:@${:Ubar:S,b,v,}@x${var}y@:Q}" 4 in target "mod-loop-varname" 5exit status 2 6