+++ src/lib/python3/Modules/expat/expat_config.h	2018-05-29 14:26:26.737762285 +0200
@@ -16,4 +16,6 @@
 #define XML_DTD 1
 #define XML_CONTEXT_BYTES 1024
 
+#undef PREFIX
+
 #endif /* EXPAT_CONFIG_H */
