version up : flex 2.6.0.

component/flex/buildout.cfg

 [buildout]
 extends =
   ../m4/buildout.cfg
+  ../xz-utils/buildout.cfg
 parts =
   flex
 
 [flex]
 recipe = slapos.recipe.cmmi
-url = http://downloads.sourceforge.net/project/flex/flex/flex-2.5.35/flex-2.5.35.tar.gz
-md5sum = 201d3f38758d95436cbc64903386de0b
+url = http://downloads.sourceforge.net/project/flex/flex-2.6.0.tar.xz
+md5sum = 3cbbfa1554d0b75fad9f8100732454de
 environment =
   M4=${m4:location}/bin/m4
+  PATH=${xz-utils:location}/bin:%(PATH)s