diff --git a/build.sh b/build.sh
index ff8996e106f06441a3dbf3c7eb4628de47470f74..38678b879ca99317c464e782d7ef169d6dfaffd2 100755
--- a/build.sh
+++ b/build.sh
@@ -55,6 +55,7 @@ fi
 
 set -e
 
+apt-get -q update
 install_packages ${BUILD_PACKAGES} ${PACKAGES}
 
 # Install the configuration, overlayed over /etc.