see https://bugs.gentoo.org/969182
PR merged https://github.com/crosswire/xiphos/pull/1264.patch
fix conflicting types for ‘in_func’ between zlib.h and zlib-ng.h used by minizip-ng[compat]
--- a/src/gtk/utilities.c
+++ b/src/gtk/utilities.c
@@ -38,8 +38,8 @@
 #include <gdk-pixbuf/gdk-pixbuf.h>
 
 #include <gtk/gtk.h>
-#include <minizip/zip.h>
 #include <zlib.h>
+#include <minizip/zip.h>
 
 #include "gui/utilities.h"
 #include "gui/preferences_dialog.h"