diff --git a/go.mod b/go.mod
index 723100ac..6fe12444 100644
--- a/go.mod
+++ b/go.mod
@@ -18,6 +18,6 @@ require (
 	k8s.io/client-go v0.19.7
 	k8s.io/code-generator v0.19.7
 	k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6
-	knative.dev/hack v0.0.0-20210426064739-88c69cd1eca7
+	knative.dev/hack v0.0.0-20210427190353-86f9adc0c8e2
 	knative.dev/pkg v0.0.0-20210426180040-cfc1eed82870
 )
diff --git a/go.sum b/go.sum
index fc6a4bc6..c5aa4579 100644
--- a/go.sum
+++ b/go.sum
@@ -1220,8 +1220,8 @@ k8s.io/utils v0.0.0-20200729134348-d5654de09c73 h1:uJmqzgNWG7XyClnU/mLPBWwfKKF1K
 k8s.io/utils v0.0.0-20200729134348-d5654de09c73/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 knative.dev/hack v0.0.0-20210325223819-b6ab329907d3 h1:km0Rrh0T9/wA2pivQm1hqSPVwgNgGCHC2WNn3GakZmE=
 knative.dev/hack v0.0.0-20210325223819-b6ab329907d3/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
-knative.dev/hack v0.0.0-20210426064739-88c69cd1eca7 h1:Z5icQ2KNCDSzTcHWMGI3KzdK/BpmgkGYdTX0RRzZul0=
-knative.dev/hack v0.0.0-20210426064739-88c69cd1eca7/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
+knative.dev/hack v0.0.0-20210427190353-86f9adc0c8e2 h1:gWUzTKUjMzXBMpkadqWdxIHlkSOuczsP1fD2qtyjge4=
+knative.dev/hack v0.0.0-20210427190353-86f9adc0c8e2/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
 knative.dev/pkg v0.0.0-20210426180040-cfc1eed82870 h1:22gVDwcYqqZDGJOEBTBCthJH88dyTSLokOWlz1E9GIg=
 knative.dev/pkg v0.0.0-20210426180040-cfc1eed82870/go.mod h1:UtcSLHy2XIz5blWoPTA40F87zk4O7erxkCwv+7Tsmws=
 pgregory.net/rapid v0.3.3/go.mod h1:UYpPVyjFHzYBGHIxLFoupi8vwk6rXNzRY9OMvVxFIOU=
diff --git a/vendor/knative.dev/hack/codegen-library.sh b/vendor/knative.dev/hack/codegen-library.sh
index 062b9049..ae5130f3 100644
--- a/vendor/knative.dev/hack/codegen-library.sh
+++ b/vendor/knative.dev/hack/codegen-library.sh
@@ -29,7 +29,7 @@ export GOPATH=$(go_mod_gopath_hack)
 export GOBIN=${GOPATH}/bin # Set GOBIN explicitly as deepcopy-gen is installed by go install.
 export MODULE_NAME=$(go_mod_module_name)
 export CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
-export KNATIVE_CODEGEN_PKG=${KNATIVE_CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./vendor/knative.dev/pkg 2>/dev/null || echo ../pkg)}
+export KNATIVE_CODEGEN_PKG=${KNATIVE_CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./vendor/knative.dev/pkg 2>/dev/null || echo "${REPO_ROOT_DIR}")}
 
 chmod +x ${CODEGEN_PKG}/generate-groups.sh
 chmod +x ${KNATIVE_CODEGEN_PKG}/hack/generate-knative.sh
diff --git a/vendor/modules.txt b/vendor/modules.txt
index a66780a9..287c93c1 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -662,7 +662,7 @@ k8s.io/kube-openapi/pkg/util/sets
 k8s.io/utils/buffer
 k8s.io/utils/integer
 k8s.io/utils/trace
-# knative.dev/hack v0.0.0-20210426064739-88c69cd1eca7
+# knative.dev/hack v0.0.0-20210427190353-86f9adc0c8e2
 ## explicit
 knative.dev/hack
 # knative.dev/pkg v0.0.0-20210426180040-cfc1eed82870