diff --git a/static/build.html b/static/build.html
index 95015a39..6483fe3c 100644
--- a/static/build.html
+++ b/static/build.html
@@ -334,6 +334,17 @@ git submodule update --init
should be user
builds as they are significantly more secure and don't
make additional performance sacrifices to improve debugging.
Set OFFICIAL_BUILD=true
to include the Updater app. You
+ must change the URL in
+ packages/apps/Updater/res/values/config.xml
to your own domain. Using the
+ official update server with a build signed with different keys will not work and will
+ essentially perform a denial of service attack on our update service. If you try to
+ use the official URL, the app will download an official update and will detect it as
+ corrupted or tampered. It will delete the update and try to download it over and over
+ again since it will never be signed with your key.
export OFFICIAL_BUILD=true+
Set OFFICIAL_BUILD=true
per the instructions above. Note that if you
+ do not change the URL to your own domain, you must disable the
+ Updater app before connecting the device to the internet, or you will be performing a
+ denial of service attack on our official update server.