# Pastebin hOHL0ECf
  GEN    Makefile.config
  GEN    doc/manual/version.txt
  GEN    doc/manual/manual.xmli
  GEN    doc/manual/manual.is-valid
I/O error : Attempt to load network entity http://docbook.org/xml/5.0/rng/docbook.rng
warning: failed to load external entity "http://docbook.org/xml/5.0/rng/docbook.rng"
Relax-NG parser error : xmlRelaxNGParse: could not load http://docbook.org/xml/5.0/rng/docbook.rng
Relax-NG schema http://docbook.org/xml/5.0/rng/docbook.rng failed to compile
-:1: parser error : Document is empty

^
doc/manual/local.mk:32: recipe for target 'doc/manual/manual.is-valid' failed
make: *** [doc/manual/manual.is-valid] Error 1