Index: head/Mk/Uses/go.mk
===================================================================
--- head/Mk/Uses/go.mk
+++ head/Mk/Uses/go.mk
@@ -165,11 +165,15 @@
 .if ${go_ARGS:Mmodules}
 _MODULES2TUPLE_CMD=	modules2tuple
 gomod-vendor: patch
-	@if type ${_MODULES2TUPLE_CMD} > /dev/null 2>&1; then \
-		cd ${WRKSRC}; ${GO_CMD} mod vendor; \
-		[ -r vendor/modules.txt ] && ${_MODULES2TUPLE_CMD} vendor/modules.txt; \
+	@if type ${GO_CMD} > /dev/null 2>&1; then \
+		if type ${_MODULES2TUPLE_CMD} > /dev/null 2>&1; then \
+			cd ${WRKSRC}; ${GO_CMD} mod vendor; \
+			[ -r vendor/modules.txt ] && ${_MODULES2TUPLE_CMD} vendor/modules.txt; \
+		else \
+			${ECHO_MSG} "===> Please install \"ports-mgmt/modules2tuple\""; \
+		fi \
 	else \
-		${ECHO_MSG} "===> Please install \"ports-mgmt/modules2tuple\""; \
+		${ECHO_MSG} "===> Please install \"${GO_PORT}\""; \
 	fi
 .endif