diff --git a/posix/payload b/posix/payload
index 6adafff..aad4149 100755
--- a/posix/payload
+++ b/posix/payload
@@ -4,9 +4,9 @@
 # TODO: extract self without resolving to $0 because it doesn't resolve links
 
 if [ -z "$XDG_CACHE_HOME" ]; then
-	destdir=/tmp
+	destdir=/tmp/tarinstall
 else
-	destdir="$XDG_CACHE_HOME"
+	destdir="$XDG_CACHE_HOME"/tarinstall
 fi
 
 if ! [ "$(head -n 1 "$destdir"/ID/checksum 2>/dev/null)" = 'SUM' ]; then