In file included from vmod_file.c:44:
vmod_file.c: In function ‘check’:
/usr/include/varnish/cache/cache.h:66:26: error: format not a string literal and no format arguments [-Werror=format-security]
   66 | #define NO_VXID ((struct vxids){0})
      |                          ^~~~~
vmod_file.c:171:32: note: in expansion of macro ‘NO_VXID’
  171 |                 VSL(SLT_Error, NO_VXID, errbuf);
      |                                ^~~~~~~
      ...