diff --git a/config/includes.chroot.oem/var/lib/pureos-oem/di-preseed.cfg b/config/includes.chroot.oem/var/lib/pureos-oem/di-preseed.cfg
index 4801e09..a3be492 100644
--- a/config/includes.chroot.oem/var/lib/pureos-oem/di-preseed.cfg
+++ b/config/includes.chroot.oem/var/lib/pureos-oem/di-preseed.cfg
@@ -77,8 +77,10 @@ d-i finish-install/reboot_in_progress note
 
 #grub-pc ucf/changeprompt string install the package maintainer's version
 
-d-i preseed/late_command string cp /cdrom/purism/50_custom /target/etc/grub.d/50_custom;\
-  chmod a+x /target/etc/grub.d/50_custom;\
-  echo "GRUB_DISABLE_OS_PROBER=true" >> /target/etc/default/grub;\
+d-i preseed/late_command string cp /cdrom/purism/50_custom /target/etc/grub.d/50_custom; \
+  chmod a+x /target/etc/grub.d/50_custom; \
+  echo "GRUB_DISABLE_OS_PROBER=true" >> /target/etc/default/grub; \
+  echo -e "#\n\ndeb http://repo.puri.sm/pureos/ green main" > /target/etc/apt/sources.list; \
+
 in-target sed -e '/boot/s/^#*/#/' -i /etc/fstab;\
 in-target update-grub;