diff -Nru live-build-3.0~a57/debian/changelog live-build-3.0~a57/debian/changelog
--- live-build-3.0~a57/debian/changelog	2020-06-03 20:18:29.000000000 -0400
+++ live-build-3.0~a57/debian/changelog	2023-10-18 12:16:49.000000000 -0400
@@ -1,3 +1,12 @@
+live-build (3.0~a57-1ubuntu38.20.04.3) focal; urgency=medium
+
+  * To avoid removing packaged preferences.d files, in lb_chroot_archives install stage, 
+    only remove apt/preferences.d/* files after we backup any existing preferences.d/ files.
+    Then during remove stage or lb_chroot_archives restore the backed up packaged 
+    preferences.d files. LP: #2033308
+
+ -- Catherine Redfield <catherine.redfield@canonical.com>  Wed, 18 Oct 2023 12:16:49 -0400
+
 live-build (3.0~a57-1ubuntu38.20.04.2) focal; urgency=medium
 
   * Add riscv64 support to live-build. LP: #1881980
diff -Nru live-build-3.0~a57/debian/patches/lp-2033308-backup-and-restore-packaged-preferences.patch live-build-3.0~a57/debian/patches/lp-2033308-backup-and-restore-packaged-preferences.patch
--- live-build-3.0~a57/debian/patches/lp-2033308-backup-and-restore-packaged-preferences.patch	1969-12-31 19:00:00.000000000 -0500
+++ live-build-3.0~a57/debian/patches/lp-2033308-backup-and-restore-packaged-preferences.patch	2023-10-18 12:16:17.000000000 -0400
@@ -0,0 +1,95 @@
+Description:
+   * To avoid removing packaged preferences.d files, in lb_chroot_archives install stage, 
+     only remove apt/preferences.d/* files after we backup any existing preferences.d/ files.
+     Then during remove stage or lb_chroot_archives restore the backed up packaged 
+     preferences.d files. LP: #2033308
+Author: Phil Roche <phil.roche@canonical.com>
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/2033308
+
+
+Index: live-build-3.0~a57/functions/apt_preferences.sh
+===================================================================
+--- /dev/null
++++ live-build-3.0~a57/functions/apt_preferences.sh
+@@ -0,0 +1,27 @@
++#!/bin/sh
++
++## live-build(7) - System Build Scripts
++## Copyright (C) 2023 Phil Roche <phil.roche@canonical.com>
++##
++## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
++## This is free software, and you are welcome to redistribute it
++## under certain conditions; see COPYING for details.
++
++
++Restore_packaged_apt_preferences ()
++{
++	if [ -d chroot/etc/apt/preferences.d.save ]; then
++		Echo_message "Restoring backed up packaged preferences.d files"
++		mv --verbose chroot/etc/apt/preferences.d.save/* chroot/etc/apt/preferences.d/
++		rmdir --verbose chroot/etc/apt/preferences.d.save
++	fi
++}
++
++Backup_packaged_apt_preferences ()
++{
++	if [ -n "$(ls -A chroot/etc/apt/preferences.d)" ]; then
++		Echo_message "Backing up packaged preferences.d/* files ..."
++		cp --archive --verbose chroot/etc/apt/preferences.d chroot/etc/apt/preferences.d.save
++	fi
++}
++
+Index: live-build-3.0~a57/scripts/build/lb_chroot_archives
+===================================================================
+--- live-build-3.0~a57.orig/scripts/build/lb_chroot_archives
++++ live-build-3.0~a57/scripts/build/lb_chroot_archives
+@@ -189,8 +189,12 @@ EOF
+ 			fi
+ 		fi
+ 
+-		# probably too bold, needs refinment (FIXME)
+-		rm -f chroot/etc/apt/preferences.d/*
++		# Only remove apt/preferences.d/* files after we backup any existing preferences.d/ files
++		# for later restoration
++		Backup_packaged_apt_preferences
++
++		Echo_message "Clean up /etc/apt/preferences.d/* now that we have persisted the existing files for later restoration ..."
++		rm --verbose --force chroot/etc/apt/preferences.d/*
+ 
+ 		# Configure third-party archives
+ 		if [ -n "${LB_ARCHIVES}" ]
+@@ -625,6 +629,11 @@ EOF
+ 			# Removing stage file
+ 			rm -f .build/chroot_archives
+ 
++			# Now that we are exiting early from the remove stage, we still need to cleanup /etc/apt/preferences.d and if
++			# there existed a preferences.d.save directory, move the files back
++			# These were backed up in the install stage before any local preferences were added
++			Restore_packaged_apt_preferences
++
+ 			exit 0
+ 		fi
+ 
+@@ -755,8 +764,9 @@ EOF
+ 			fi
+ 		fi
+ 
+-		# probably too bold, needs refinment (FIXME)
+-		rm -f chroot/etc/apt/preferences.d/*
++
++		Echo_message "Clean up /etc/apt/preferences.d/*. Any previous packaged files have been backed up to chroot/etc/apt/preferences.d.save in the install stage for later restoration ..."
++		rm --verbose --force chroot/etc/apt/preferences.d/*
+ 
+ 		# Configure third-party archives
+ 		if [ -n "${LB_ARCHIVES}" ]
+@@ -889,6 +899,10 @@ EOF
+ 			apt-key del ${_LB_LOCAL_KEY_EMAIL}
+ 		fi
+ 
++		# If there existed a preferences.d.save directory, move the files back
++		# These were backed up before any local preferences were added
++		Restore_packaged_apt_preferences
++
+ 		# Removing stage file
+ 		rm -f .build/chroot_archives
+ 		;;
diff -Nru live-build-3.0~a57/debian/patches/series live-build-3.0~a57/debian/patches/series
--- live-build-3.0~a57/debian/patches/series	2020-06-03 20:18:00.000000000 -0400
+++ live-build-3.0~a57/debian/patches/series	2023-10-18 12:16:17.000000000 -0400
@@ -42,3 +42,4 @@
 drop-default-initramfs-compression-override.patch
 ubuntu-make-genisoimage-more-flexible.patch
 add-riscv64.patch
+lp-2033308-backup-and-restore-packaged-preferences.patch