diff --git a/xbps-src/libexec/xbps-src-chroot-helper.sh.in b/xbps-src/libexec/xbps-src-chroot-helper.sh.in
index 1c4a1cd088..98070b23e3 100644
--- a/xbps-src/libexec/xbps-src-chroot-helper.sh.in
+++ b/xbps-src/libexec/xbps-src-chroot-helper.sh.in
@@ -59,6 +59,10 @@ mount_chroot_fs()
 					;;
 				*) blah=/${f};;
 			esac
+			if [ -z "$XBPS_CACHEDIR" -a "$f" = "cachedir" ]; then
+				echo "unset, ignoring."
+				continue
+			fi
 			[ ! -d ${blah} ] && echo "failed." && continue
 			@@XBPS_INSTALL_LIBEXECDIR@@/xbps-src-chroot-capmount \
 				${dowrite} ${blah} ${XBPS_MASTERDIR}/${f} \