(/root/texmf/tex/latex/fontawesome5/fontawesome5-utex-helper.sty
! Undefined control sequence.
<argument> ...ignalAlt ,faDiceD }regex_const:Nn
                                                  c__fontawesome_alt_regex ...
l.58 }

apt-cache policy texlive-xetex
texlive-xetex:
  Installed: 2016.20170123-5
  Candidate: 2016.20170123-5