diff --git a/hack/generate-groups.sh b/hack/generate-groups.sh
index 3e9276643ba..cfc2576a856 100755
--- a/hack/generate-groups.sh
+++ b/hack/generate-groups.sh
@@ -46,8 +46,12 @@ APIS_PKG="$3"
 GROUPS_WITH_VERSIONS="$4"
 shift 4
 
-GO111MODULE=off go get k8s.io/code-generator/cmd/{defaulter-gen,client-gen,lister-gen,informer-gen,deepcopy-gen,conversion-gen}
-
+(
+  # To support running this script from anywhere, first cd into this directory,
+  # and then install with forced module mode on and fully qualified name.
+  cd "$(dirname "${0}")"
+  GO111MODULE=on go install k8s.io/code-generator/cmd/{defaulter-gen,client-gen,lister-gen,informer-gen,deepcopy-gen}
+)
 # Go installs the above commands to get installed in $GOBIN if defined, and $GOPATH/bin otherwise:
 GOBIN="$(go env GOBIN)"
 gobin="${GOBIN:-$(go env GOPATH)/bin}"
@@ -67,7 +71,7 @@ done
 
 if [ "${GENS}" = "all" ] || grep -qw "deepcopy" <<<"${GENS}"; then
   echo "Generating deepcopy funcs"
-  "${gobin}/deepcopy-gen" --input-dirs "$(codegen::join , "${FQ_APIS[@]}")" -O zz_generated.deepcopy --bounding-dirs "${APIS_PKG}" "$@"
+  "${gobin}/deepcopy-gen" --input-dirs "$(codegen::join , "${FQ_APIS[@]}")" -O zz_generated.deepcopy "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "client" <<<"${GENS}"; then
diff --git a/hack/generate-internal-groups.sh b/hack/generate-internal-groups.sh
index b8d7c5de427..2c114a37039 100755
--- a/hack/generate-internal-groups.sh
+++ b/hack/generate-internal-groups.sh
@@ -47,11 +47,12 @@ EXT_APIS_PKG="$4"
 GROUPS_WITH_VERSIONS="$5"
 shift 5
 
-GO111MODULE=off go get k8s.io/code-generator/cmd/{defaulter-gen,client-gen,lister-gen,informer-gen,deepcopy-gen,conversion-gen,openapi-gen}
-
-# Go installs the above commands to get installed in $GOBIN if defined, and $GOPATH/bin otherwise:
-GOBIN="$(go env GOBIN)"
-gobin="${GOBIN:-$(go env GOPATH)/bin}"
+(
+  # To support running this script from anywhere, first cd into this directory,
+  # and then install with forced module mode on and fully qualified name.
+  cd "$(dirname "${0}")"
+  GO111MODULE=on go install k8s.io/code-generator/cmd/{defaulter-gen,conversion-gen,client-gen,lister-gen,informer-gen,deepcopy-gen,openapi-gen}
+)
 
 function codegen::join() { local IFS="$1"; shift; echo "$*"; }
 
@@ -76,36 +77,36 @@ done
 
 if [ "${GENS}" = "all" ] || grep -qw "deepcopy" <<<"${GENS}"; then
   echo "Generating deepcopy funcs"
-  "${gobin}/deepcopy-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" -O zz_generated.deepcopy --bounding-dirs "${INT_APIS_PKG},${EXT_APIS_PKG}" "$@"
+  "${GOPATH}/bin/deepcopy-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" -O zz_generated.deepcopy "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "defaulter" <<<"${GENS}"; then
   echo "Generating defaulters"
-  "${gobin}/defaulter-gen"  --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" -O zz_generated.defaults "$@"
+  "${GOPATH}/bin/defaulter-gen"  --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}")" -O zz_generated.defaults "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "conversion" <<<"${GENS}"; then
   echo "Generating conversions"
-  "${gobin}/conversion-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" -O zz_generated.conversion "$@"
+  "${GOPATH}/bin/conversion-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" -O zz_generated.conversion "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "client" <<<"${GENS}"; then
   echo "Generating clientset for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}"
   if [ -n "${INT_APIS_PKG}" ]; then
     IFS=" " read -r -a APIS <<< "$(printf '%s/ ' "${INT_FQ_APIS[@]}")"
-    "${gobin}/client-gen" --clientset-name "${CLIENTSET_NAME_INTERNAL:-internalversion}" --input-base "" --input "$(codegen::join , "${APIS[@]}")" --output-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}" "$@"
+    "${GOPATH}/bin/client-gen" --clientset-name "${CLIENTSET_NAME_INTERNAL:-internalversion}" --input-base "" --input "$(codegen::join , "${APIS[@]}")" --output-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}" "$@"
   fi
-  "${gobin}/client-gen" --clientset-name "${CLIENTSET_NAME_VERSIONED:-versioned}" --input-base "" --input "$(codegen::join , "${EXT_FQ_APIS[@]}")" --output-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}" "$@"
+  "${GOPATH}/bin/client-gen" --clientset-name "${CLIENTSET_NAME_VERSIONED:-versioned}" --input-base "" --input "$(codegen::join , "${EXT_FQ_APIS[@]}")" --output-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}" "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "lister" <<<"${GENS}"; then
   echo "Generating listers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/listers"
-  "${gobin}/lister-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" --output-package "${OUTPUT_PKG}/listers" "$@"
+  "${GOPATH}/bin/lister-gen" --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" --output-package "${OUTPUT_PKG}/listers" "$@"
 fi
 
 if [ "${GENS}" = "all" ] || grep -qw "informer" <<<"${GENS}"; then
   echo "Generating informers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/informers"
-  "${gobin}/informer-gen" \
+  "${GOPATH}/bin/informer-gen" \
            --input-dirs "$(codegen::join , "${ALL_FQ_APIS[@]}")" \
            --versioned-clientset-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}/${CLIENTSET_NAME_VERSIONED:-versioned}" \
            --internal-clientset-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}/${CLIENTSET_NAME_INTERNAL:-internalversion}" \
@@ -117,8 +118,8 @@ fi
 if [ "${GENS}" = "all" ] || grep -qw "openapi" <<<"${GENS}"; then
   echo "Generating OpenAPI definitions for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/openapi"
   declare -a OPENAPI_EXTRA_PACKAGES
-  "${gobin}/openapi-gen" \
-           --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}" "${OPENAPI_EXTRA_PACKAGES[@]}")" \
+  "${GOPATH}/bin/openapi-gen" \
+           --input-dirs "$(codegen::join , "${EXT_FQ_APIS[@]}" "${OPENAPI_EXTRA_PACKAGES[@]+"${OPENAPI_EXTRA_PACKAGES[@]}"}")" \
            --input-dirs "k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/apimachinery/pkg/runtime,k8s.io/apimachinery/pkg/version" \
            --output-package "${OUTPUT_PKG}/openapi" \
            -O zz_generated.openapi \
diff --git a/hack/update-gencode.sh b/hack/update-gencode.sh
index 31568008eaa..903f01ef5e6 100755
--- a/hack/update-gencode.sh
+++ b/hack/update-gencode.sh
@@ -26,12 +26,12 @@ SCRIPT_ROOT=$(unset CDPATH && cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)
 # --output-base    because this script should also be able to run inside the vendor dir of
 #                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
-bash vendor/k8s.io/code-generator/generate-groups.sh "deepcopy,client,informer,lister" \
+bash hack/generate-groups.sh "deepcopy,client,informer,lister" \
   volcano.sh/apis/pkg/client volcano.sh/apis/pkg/apis \
   "batch:v1alpha1 bus:v1alpha1 scheduling:v1beta1" \
   --go-header-file ${SCRIPT_ROOT}/hack/boilerplate/boilerplate.go.txt
 
-bash vendor/k8s.io/code-generator/generate-internal-groups.sh "deepcopy,conversion" \
+bash hack/generate-internal-groups.sh "deepcopy,conversion" \
   volcano.sh/apis/pkg/apis/ volcano.sh/apis/pkg/apis volcano.sh/apis/pkg/apis\
   "scheduling:v1beta1"   \
   --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \