make: "var-eval-short.mk" line 46: In the :@ modifier of "", the variable name "${FAIL}" must not contain a dollar make: "var-eval-short.mk" line 46: Malformed conditional (0 && ${:Uword:@${FAIL}@expr@}) CondParser_Eval: 0 && ${0:?${FAIL}then:${FAIL}else} Var_Parse: ${0:?${FAIL}then:${FAIL}else} (parse-only) Parsing modifier ${0:?...} Var_Parse: ${FAIL}then:${FAIL}else} (parse-only) Modifier part: "${FAIL}then" Var_Parse: ${FAIL}else} (parse-only) Modifier part: "${FAIL}else" Result of ${0:?${FAIL}then:${FAIL}else} is "" (parse-only, defined) Parsing line 167: DEFINED= defined Global: DEFINED = defined CondParser_Eval: 0 && ${DEFINED:L:?${FAIL}then:${FAIL}else} Var_Parse: ${DEFINED:L:?${FAIL}then:${FAIL}else} (parse-only) Parsing modifier ${DEFINED:L} Result of ${DEFINED:L} is "defined" (parse-only, regular) Parsing modifier ${DEFINED:?...} Var_Parse: ${FAIL}then:${FAIL}else} (parse-only) Modifier part: "${FAIL}then" Var_Parse: ${FAIL}else} (parse-only) Modifier part: "${FAIL}else" Result of ${DEFINED:?${FAIL}then:${FAIL}else} is "defined" (parse-only, regular) Parsing line 170: .MAKEFLAGS: -d0 ParseDependency(.MAKEFLAGS: -d0) Global: .MAKEFLAGS = -r -k -d cpv -d Global: .MAKEFLAGS = -r -k -d cpv -d 0 make: Fatal errors encountered -- cannot continue make: stopped in unit-tests exit status 1