- check for existing usage binary, so it get's more obvious that the toplevel
  Makefile uses the wrong path to the binary (it's in top_builddir and not in top_srcdir)
diff --git a/scripts/usage_compressed b/scripts/usage_compressed
index fa12e40..ce672db 100644
--- a/scripts/usage_compressed
+++ b/scripts/usage_compressed
@@ -3,6 +3,7 @@
 loc="$1"
 
 test "$loc" || loc=.
+test -x "$loc/usage" || exit 1
 
 echo 'static const char packed_usage[] = '
 "$loc"/usage | bzip2 -9 | od -v -t x1 \