diff -Nru source/build/Makefile source_no_proposed/build/Makefile
--- source/build/Makefile	2022-10-20 08:22:18.334230755 -0500
+++ source_no_proposed/build/Makefile	2022-10-20 08:25:19.346634640 -0500
@@ -636,7 +636,7 @@
 			echo "deb $(MIRROR) unreleased $(UDEB_COMPONENTS)"; \
 		fi \
 	else \
-		gen-sources.list.udeb "$(SYSTEM_SOURCES_LIST)" $(USE_UDEBS_FROM) $(UDEB_COMPONENTS) $(USE_PROPOSED_UPDATES); \
+		gen-sources.list.udeb "$(SYSTEM_SOURCES_LIST)" $(USE_UDEBS_FROM) $(UDEB_COMPONENTS); \
 		if [ "$(USE_UNRELEASED)" = 1 ]; then \
 			gen-sources.list.udeb "$(SYSTEM_SOURCES_LIST)" unreleased $(UDEB_COMPONENTS); \
 		fi \
@@ -648,10 +648,6 @@
 		echo "Using generated $@:"; \
 		sed -n "/^[^#]/ s/^/   /p" $@; \
 	fi
-	@if [ "$(USE_PROPOSED_UPDATES)" = 1 ] && ! grep -q proposed-updates $@; then \
-		echo "ERROR: no valid source for $(USE_UDEBS_FROM)-proposed-updates"; \
-		exit 1; \
-	fi
 
 # Font generation.
 #
diff -Nru source/build/util/gen-sources.list.udeb source_no_proposed/build/util/gen-sources.list.udeb
--- source/build/util/gen-sources.list.udeb	2022-09-06 15:55:12.000000000 -0500
+++ source_no_proposed/build/util/gen-sources.list.udeb	2022-10-20 08:26:32.538801725 -0500
@@ -8,7 +8,6 @@
 SOURCES_LIST=$1
 SUITE=$2
 UDEB_COMPONENTS=$3
-USE_PROPOSED_UPDATES=$4 # optional
 
 # Set to 1 or 2 to see increasing debug info about mirror tests
 # Use 0 for quiet (normal) operation
@@ -84,16 +83,8 @@
 		else
 			echo "WARNING: mirror '$tmirror' appears to be invalid; skipping" >&2
 		fi
-		if [ "$USE_PROPOSED_UPDATES" = 1 ] &&
-		   test_url $tmirror/dists/$SUITE-proposed-updates/Release; then
-			echo "$mirror $SUITE-proposed-updates $UDEB_COMPONENTS"
-			echo "INFO: using '$tmirror' for $SUITE-proposed-updates" >&2
-		fi
 	else
 		echo "$mirror $SUITE $UDEB_COMPONENTS"
-		if [ "$USE_PROPOSED_UPDATES" = 1 ]; then
-			echo "$mirror $SUITE-proposed-updates $UDEB_COMPONENTS"
-		fi
 	fi
 
 done | perl -ne 'print unless $seen{$_}; $seen{$_}=1'
diff -Nru source/debian/rules source_no_proposed/debian/rules
--- source/debian/rules	2022-10-20 08:22:18.318230720 -0500
+++ source_no_proposed/debian/rules	2022-10-20 08:26:53.702850378 -0500
@@ -13,7 +13,6 @@
 BOOTMENU_BEEP=n
 else
 USE_UDEBS_FROM=aramo
-USE_PROPOSED_UPDATES=1
 TRANSSTATUS=translation-status
 BOOTMENU_BEEP=y
 endif