diff --git a/Makefile b/Makefile
index 694ff7f676..d7a91f57f5 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,9 @@ BAZEL_CONFIG?=
 API_OPTIONS?=
 GCFLAGS?=
 
+# This can be removed when we upgrade to go 1.14
+export GOFLAGS=-mod=vendor
+
 UPLOAD_CMD=$(KOPS_ROOT)/hack/upload
 
 # Unexport environment variables that can affect tests and are not used in builds
@@ -448,7 +451,7 @@ gomod-prereqs:
 
 .PHONY: gomod
 gomod: gomod-prereqs
-	GO111MODULE=on go mod vendor
+	GO111MODULE=on GOFLAGS= go mod vendor
 	# Switch weavemesh to use peer_name_hash - bazel rule-go doesn't support build tags yet
 	rm vendor/github.com/weaveworks/mesh/peer_name_mac.go
 	sed -i -e 's/peer_name_hash/!peer_name_mac/g' vendor/github.com/weaveworks/mesh/peer_name_hash.go
diff --git a/hack/make-apimachinery.sh b/hack/make-apimachinery.sh
index 106001710c..2d313e4ec7 100755
--- a/hack/make-apimachinery.sh
+++ b/hack/make-apimachinery.sh
@@ -30,6 +30,7 @@ mkdir -p "${WORK_DIR}/go/"
 cp -R "${GOPATH}/src/k8s.io/kops/vendor/" "${WORK_DIR}/go/src"
 
 unset GOBIN
+unset GOFLAGS
 
 env GOBIN="${WORK_DIR}/go/bin" GOPATH="${WORK_DIR}/go/" go install -v k8s.io/code-generator/cmd/conversion-gen/
 cp "${WORK_DIR}/go/bin/conversion-gen" "${GOPATH}/bin/"