diff --git a/.github/workflows/scripts/qemu-1-setup.sh b/.github/workflows/scripts/qemu-1-setup.sh
index 0278264d9279..a597e3462f04 100755
--- a/.github/workflows/scripts/qemu-1-setup.sh
+++ b/.github/workflows/scripts/qemu-1-setup.sh
@@ -13,6 +13,20 @@ set -eu
 # handle on what the timeout value should be.
 (while [ 1 ] ; do sleep 30 && echo "[watchdog: $(ps -eo cmd --sort=-pcpu  | head -n 2 | tail -n 1)}')]"; done) &
 
+# The default 'azure.archive.ubuntu.com' mirrors can be really slow.
+# Prioritize the official Ubuntu mirrors.
+#
+# The normal apt-mirrors.txt will look like:
+#
+# http://azure.archive.ubuntu.com/ubuntu/       priority:1
+# https://archive.ubuntu.com/ubuntu/    priority:2
+# https://security.ubuntu.com/ubuntu/   priority:3
+#
+# Just delete the 'azure.archive.ubuntu.com' line.
+sudo sed -i '/azure.archive.ubuntu.com/d' /etc/apt/apt-mirrors.txt
+echo "Using mirrors:"
+cat /etc/apt/apt-mirrors.txt
+
 # install needed packages
 export DEBIAN_FRONTEND="noninteractive"
 sudo apt-get -y update