build with -mod vendor

Makefile

@@ -67,7 +67,7 @@ TESTS     := ./...
 TESTFLAGS :=
 LDFLAGS   := -w -s -X github.com/rancher/k3d/v5/version.Version=${GIT_TAG} -X github.com/rancher/k3d/v5/version.K3sVersion=${K3S_TAG}
 GCFLAGS   := 
-GOFLAGS   :=
+GOFLAGS   := -mod vendor
 BINDIR    := $(CURDIR)/bin
 BINARIES  := k3d
 

version/version.go

@@ -40,7 +40,7 @@ var K3sVersion = "v1.21.4-k3s2"
 // GetVersion returns the version for cli, it gets it from "git describe --tags" or returns "dev" when doing simple go build
 func GetVersion() string {
 	if len(Version) == 0 {
-		return "v4-dev"
+		return "v5-dev"
 	}
 	return Version
 }