diff --git a/utils/update-mojo.sh b/utils/update-mojo.sh
index fcbc81e70529..967d139a3f70 100755
--- a/utils/update-mojo.sh
+++ b/utils/update-mojo.sh
@@ -30,14 +30,18 @@ if [ -n "$(git -C "${chromium_dir}" status --porcelain)" ] ; then
 	exit 1
 fi
 
+# Remove the previously imported files.
+rm -rf "${ipc_dir}/mojo/"
+rm -rf "${ipc_dir}/tools/"
+
 # Copy the diagnosis file
+mkdir -p "${ipc_dir}/tools/diagnosis"
 cp "${chromium_dir}/tools/diagnosis/crbug_1001171.py" "${ipc_dir}/tools/diagnosis"
 
 # Copy the rest of mojo
+mkdir -p "${ipc_dir}/mojo/public"
 cp "${chromium_dir}/mojo/public/LICENSE" "${ipc_dir}/mojo/public"
 
-rm -rf "${ipc_dir}/mojo/public/tools/*"
-
 (
 	cd "${chromium_dir}" || exit
 	find ./mojo/public/tools -type f \