GOVERSION := $(shell go version |grep -o '[0-9\.]*'|head -n 1)
GOVERMAJ := $(shell echo $(GOVERSION) |cut -f1 -d.)
GOVERMIN := $(shell echo $(GOVERSION) |cut -f2 -d.)
GOVERSION := $(shell go version |grep -o '[0-9\.]*'|head -n 1)
GOVERMAJ := $(shell echo $(GOVERSION) |cut -f1 -d.)
GOVERMIN := $(shell echo $(GOVERSION) |cut -f2 -d.)
-CHECKGOVER := $(shell [ $(GOVERMAJ) -gt 1 -o \( $(GOVERMAJ) -eq 1 -a $(GOVERMIN) -ge 8 \) ] && echo true)
-CHECKERRMSG := "ERROR: Go version 1.8.1 or higher is requested (current detected version: $(GOVERSION))."
+CHECKGOVER := $(shell [ $(GOVERMAJ) -gt 1 -o \( $(GOVERMAJ) -eq 1 -a $(GOVERMIN) -ge 9 \) ] && echo true)
+CHECKERRMSG := "ERROR: Go version 1.9.0 or higher is requested (current detected version: $(GOVERSION))."