diff -Naur dracut-045/dracut.sh dracut-045-busybox-realpath/dracut.sh
--- dracut-045/dracut.sh	2017-04-03 10:26:25.000000000 +0200
+++ dracut-045-busybox-realpath/dracut.sh	2017-04-06 11:50:15.929988218 +0200
@@ -843,7 +843,7 @@
 
 [[ $reproducible == yes ]] && DRACUT_REPRODUCIBLE=1
 
-readonly TMPDIR="$(realpath -e "$tmpdir")"
+readonly TMPDIR="$(realpath "$tmpdir")"
 [ -d "$TMPDIR" ] || {
     printf "%s\n" "dracut: Invalid tmpdir '$tmpdir'." >&2
     exit 1