--- flex-2.6.4.orig/Makefile.am	2017-05-03 21:16:37.000000000 +0100
+++ flex-2.6.4/Makefile.am	2018-03-14 05:10:52.408504620 +0100
@@ -43,10 +43,6 @@ EXTRA_DIST = \
 
 SUBDIRS = \
 	src \
-	doc \
-	examples \
-	po \
-	tests \
 	tools
 
 # Create the ChangeLog, but only if we're inside a git working directory