diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index 15129ed2..9f6d0a9c 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -18,11 +18,8 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-export GO111MODULE=on
-go mod download
-
 SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
-CODEGEN_PKG=${CODEGEN_PKG:-$(echo `go env GOPATH`'/pkg/mod/k8s.io/code-generator@v0.0.0-20190511023357-639c964206c2')}
+CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 
 chmod +x ${CODEGEN_PKG}/generate-groups.sh
 
diff --git a/vendor/k8s.io/code-generator/generate-groups.sh b/vendor/k8s.io/code-generator/generate-groups.sh
old mode 100644
new mode 100755