diff --git a/Makefile b/Makefile
index 6e1916a..b1a838a 100644
--- a/Makefile
+++ b/Makefile
@@ -48,6 +48,10 @@ FORCE:
 
 noop: # do nothing
 
+# Set empty value for MAKECMDGOALS to prevent the "warning: undefined variable 'MAKECMDGOALS'"
+# warning from happening when running make without arguments
+MAKECMDGOALS ?=
+
 ##################################
 # Host OS and architecture setup #
 ##################################
diff --git a/klone.yaml b/klone.yaml
index dbcfbaf..34b2bf0 100644
--- a/klone.yaml
+++ b/klone.yaml
@@ -9,60 +9,60 @@ targets:
     - folder_name: api-docs
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/api-docs
     - folder_name: boilerplate
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/boilerplate
     - folder_name: cert-manager
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/cert-manager
     - folder_name: controller-gen
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/controller-gen
     - folder_name: generate-verify
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/generate-verify
     - folder_name: go
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/go
     - folder_name: help
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/help
     - folder_name: kind
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/kind
     - folder_name: klone
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/klone
     - folder_name: oci-build
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/oci-build
     - folder_name: repository-base
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/repository-base
     - folder_name: tools
       repo_url: https://github.com/cert-manager/makefile-modules.git
       repo_ref: main
-      repo_hash: ad721163bbe8d8d755d54c88a2b2475aeb7c79de
+      repo_hash: 9b0502fdd5860b18fd6a9ddf86f148604a214fe4
       repo_path: modules/tools
diff --git a/make/_shared/generate-verify/util/verify.sh b/make/_shared/generate-verify/util/verify.sh
index 0416c67..4dbaefa 100755
--- a/make/_shared/generate-verify/util/verify.sh
+++ b/make/_shared/generate-verify/util/verify.sh
@@ -44,8 +44,7 @@ cleanup() {
 }
 trap "cleanup" EXIT SIGINT
 
-cp -a "${projectdir}/." "${tmp}"
-rm -rf "${tmp}/_bin" # clear all cached files
+rsync -aEq "${projectdir}/." "${tmp}" --exclude "_bin/"
 pushd "${tmp}" >/dev/null
 
 "$@"
diff --git a/make/_shared/help/help.sh b/make/_shared/help/help.sh
index 96c4ad8..d9c831f 100755
--- a/make/_shared/help/help.sh
+++ b/make/_shared/help/help.sh
@@ -14,7 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -eu -o pipefail
+set -o errexit
+set -o nounset
+set -o pipefail
 
 ## 1. Build set of extracted line items
 
diff --git a/make/_shared/repository-base/base/Makefile b/make/_shared/repository-base/base/Makefile
index 6e1916a..b1a838a 100644
--- a/make/_shared/repository-base/base/Makefile
+++ b/make/_shared/repository-base/base/Makefile
@@ -48,6 +48,10 @@ FORCE:
 
 noop: # do nothing
 
+# Set empty value for MAKECMDGOALS to prevent the "warning: undefined variable 'MAKECMDGOALS'"
+# warning from happening when running make without arguments
+MAKECMDGOALS ?=
+
 ##################################
 # Host OS and architecture setup #
 ##################################
diff --git a/make/_shared/tools/00_mod.mk b/make/_shared/tools/00_mod.mk
index 2e76fd1..7a7ed44 100644
--- a/make/_shared/tools/00_mod.mk
+++ b/make/_shared/tools/00_mod.mk
@@ -576,6 +576,7 @@ $(DOWNLOAD_DIR)/tools/rclone@$(RCLONE_VERSION)_$(HOST_OS)_$(HOST_ARCH): | $(DOWN
 MISSING=$(shell (command -v curl >/dev/null || echo curl) \
              && (command -v sha256sum >/dev/null || command -v shasum >/dev/null || echo sha256sum) \
              && (command -v git >/dev/null || echo git) \
+             && (command -v rsync >/dev/null || echo rsync) \
              && ([ -n "$(findstring vendor-go,$(MAKECMDGOALS),)" ] \
                 || command -v $(GO) >/dev/null || echo "$(GO) (or run 'make vendor-go')") \
              && (command -v $(CTR) >/dev/null || echo "$(CTR) (or set CTR to a docker-compatible tool)"))
diff --git a/make/_shared/tools/util/checkhash.sh b/make/_shared/tools/util/checkhash.sh
index f626f6f..62e5489 100755
--- a/make/_shared/tools/util/checkhash.sh
+++ b/make/_shared/tools/util/checkhash.sh
@@ -14,7 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -eu -o pipefail
+set -o errexit
+set -o nounset
+set -o pipefail
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
diff --git a/make/_shared/tools/util/hash.sh b/make/_shared/tools/util/hash.sh
index 3e58bfc..21d006f 100755
--- a/make/_shared/tools/util/hash.sh
+++ b/make/_shared/tools/util/hash.sh
@@ -14,7 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -eu -o pipefail
+set -o errexit
+set -o nounset
+set -o pipefail
 
 # This script is a wrapper for outputting purely the sha256 hash of the input file,
 # ideally in a portable way.
diff --git a/make/_shared/tools/util/lock.sh b/make/_shared/tools/util/lock.sh
index 6c6a7b8..d3c437e 100755
--- a/make/_shared/tools/util/lock.sh
+++ b/make/_shared/tools/util/lock.sh
@@ -14,7 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -eu -o pipefail
+set -o errexit
+set -o nounset
+set -o pipefail
 
 # This script is used to lock a file while it is being downloaded. It prevents
 # multiple processes from downloading the same file at the same time or from reading
@@ -66,6 +68,5 @@ finish() {
     rm -rf "$finalfile" || true
   fi
   rm -rf "$lockfile" || true
-  exit $rv
 }
-trap finish EXIT
+trap finish EXIT SIGINT