diff -u -r ../flex-2.6.4/Makefile.in ./Makefile.in
--- ../flex-2.6.4/Makefile.in 2017-05-06 16:49:09.000000000 +0200
+++ ./Makefile.in 2018-04-29 23:46:48.128733975 +0200
@@ -453,7 +453,6 @@
doc \
examples \
po \
- tests \
tools
all: all-recursive