diff --git a/staging/src/k8s.io/code-generator/generate-groups.sh b/staging/src/k8s.io/code-generator/generate-groups.sh
index 1c2fd7a55bd..53faad09cbd 100755
--- a/staging/src/k8s.io/code-generator/generate-groups.sh
+++ b/staging/src/k8s.io/code-generator/generate-groups.sh
@@ -47,10 +47,10 @@ GROUPS_WITH_VERSIONS="$4"
 shift 4
 
 (
-  # To support running this script from anywhere, we have to first cd into this directory
-  # so we can install the tools.
+  # 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}")"
-  go install ./cmd/{defaulter-gen,client-gen,lister-gen,informer-gen,deepcopy-gen}
+  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)"
diff --git a/staging/src/k8s.io/code-generator/generate-internal-groups.sh b/staging/src/k8s.io/code-generator/generate-internal-groups.sh
index e4430b27d5b..4413bd471e9 100755
--- a/staging/src/k8s.io/code-generator/generate-internal-groups.sh
+++ b/staging/src/k8s.io/code-generator/generate-internal-groups.sh
@@ -47,7 +47,12 @@ EXT_APIS_PKG="$4"
 GROUPS_WITH_VERSIONS="$5"
 shift 5
 
-go install ./"$(dirname "${0}")"/cmd/{defaulter-gen,conversion-gen,client-gen,lister-gen,informer-gen,deepcopy-gen,openapi-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,conversion-gen,client-gen,lister-gen,informer-gen,deepcopy-gen,openapi-gen}
+)
 
 function codegen::join() { local IFS="$1"; shift; echo "$*"; }