diff --git a/util/fetch_ech_config_list.go b/util/fetch_ech_config_list.go
index 8f09e66..732d0d3 100644
--- a/util/fetch_ech_config_list.go
+++ b/util/fetch_ech_config_list.go
@@ -12,6 +12,8 @@
 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+//go:build ignore
+
 package main
 
 import (