diff --git a/.woodpecker/build.yaml b/.woodpecker/build.yaml
index 60ddf45..605cc91 100644
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -25,7 +25,7 @@ steps:
       - sysctl hw.usermem
 
       # clean up earlier runs, if any
-      - if jls | grep -q test; then jail -r test; mount | cut -d' ' -f3 | grep /jail | tac | while read D; do umount $D; done; fi
+      - if jls | grep -q test; then jail -r test; mount | cut -d' ' -f3 | grep /jail | sed '1!G;h;$!d' | while read D; do umount $D; done; fi
       - chflags -R noschg /jail
       - rm -rf /jail