diff --git a/live-build/config/hooks/vm-artifacts/83-etc-apt-sources-list.binary b/live-build/config/hooks/vm-artifacts/83-etc-apt-sources-list.binary
index 40aee271..fb8258ff 100755
--- a/live-build/config/hooks/vm-artifacts/83-etc-apt-sources-list.binary
+++ b/live-build/config/hooks/vm-artifacts/83-etc-apt-sources-list.binary
@@ -33,9 +33,9 @@ chroot binary bash -c 'rm -f /etc/apt/sources.list /etc/apt/sources.list.d/*'
 # sources configuration that points to our internal Ubuntu mirror.
 #
 if [[ $APPLIANCE_VARIANT = "internal-dev" ]]; then
-	cat <<-EOF >/etc/apt/sources.list.d/delphix.list
+	chroot binary bash -c 'cat <<-EOF >/etc/apt/sources.list.d/delphix.list
 		deb http://linux-package-mirror-v2.delphix.com/develop/latest/ubuntu noble main restricted multiverse universe
 		deb http://linux-package-mirror-v2.delphix.com/develop/latest/ubuntu noble-updates main restricted multiverse universe
 		deb http://linux-package-mirror-v2.delphix.com/develop/latest/ubuntu noble-security main
-	EOF
+	EOF'
 fi