On Thu, Sep 07, 2017 at 11:00:44AM +0200, Fabian Klötzl wrote: > Note that GRAPHML_NAMESPACE_URI is only defined if > > #if HAVE_LIBXML == 1 > > see src/foreign-graphml.c:37. Maybe hoisting it out of that block might > help? Uhmm, yes, I missed this. Adding Build-Depends libxml2-dev helped ... Thanks for helping me reading Andreas. -- http://fam-tille.de