diff --git a/coverage.sh b/coverage.sh
index 408938c..ef4950d 100755
--- a/coverage.sh
+++ b/coverage.sh
@@ -29,6 +29,10 @@ for dist in stable testing unstable; do
 		if [ "$dist" = 'stable' ] && [ "$variant" = '-' ]; then
 			continue
 		fi
+		# skip because of #917386 and #917407
+		if [ "$dist" = 'unstable' ] && [ "$variant" = '-' ]; then
+			continue
+		fi
 
 		if [ ! -e "shared/cache/debian-$dist-$variant.tar" ]; then
 			echo "shared/cache/debian-$dist-$variant.tar does not exist" >&2
@@ -93,6 +97,10 @@ for dist in stable testing unstable; do
 		if [ "$dist" = 'stable' ] && [ "$variant" = '-' ]; then
 			continue
 		fi
+		# skip because of #917386 and #917407
+		if [ "$dist" = 'unstable' ] && [ "$variant" = '-' ]; then
+			continue
+		fi
 		print_header "mode=root,variant=$variant: check against debootstrap $dist"
 
 		cat << END > shared/test.sh
diff --git a/make_mirror.sh b/make_mirror.sh
index bbae00f..28689cb 100755
--- a/make_mirror.sh
+++ b/make_mirror.sh
@@ -255,6 +255,10 @@ for dist in stable testing unstable; do
 		if [ "$dist" = 'stable' ] && [ "$variant" = '-' ]; then
 			continue
 		fi
+		# skip because of #917386 and #917407
+		if [ "$dist" = 'unstable' ] && [ "$variant" = '-' ]; then
+			continue
+		fi
 		echo running debootstrap --no-merged-usr --variant=$variant $dist /tmp/debian-$dist-debootstrap $mirror
 		cat << END > shared/test.sh
 #!/bin/sh