diff --git a/tools/qemu-ubuntu-img/generate-images.py b/tools/qemu-ubuntu-img/generate-images.py
index 850dfa2..c7c1203 100755
--- a/tools/qemu-ubuntu-img/generate-images.py
+++ b/tools/qemu-ubuntu-img/generate-images.py
@@ -19,6 +19,8 @@ releases = [
 template = '''
 FROM ubuntu:{version}
 
+RUN sed -i 's;http://archive.ubuntu.com/ubuntu;{repository};' /etc/apt/sources.list
+
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update
 RUN apt-get install -y debootstrap qemu-utils