testing/gosu: fix build

testing/gosu/APKBUILD

@@ -31,7 +31,9 @@ prepare() {
 }
 
 build() {
-	CGO_ENABLED=0 GOPATH="$startdir:$srcdir/$_runc_repo/Godeps/_workspace" \
+	CGO_ENABLED=0 \
+		GOPATH="$startdir:$srcdir/$_runc_repo/Godeps/_workspace" \
+		GO111MODULE=off \
 		go build -v -ldflags '-s -w'
 }