fontspec.sty from dev-texlive/texlive-xetex-2010 unconditionally requires the package expl3.sty via: \RequirePackage{expl3,xparse} ~ % kpsewhich fontspec.sty /usr/share/texmf-dist/tex/latex/fontspec/fontspec.sty ~ % qfile -v /usr/share/texmf-dist/tex/latex/fontspec/fontspec.sty dev-texlive/texlive-xetex-2010 (/usr/share/texmf-dist/tex/latex/fontspec/fontspec.sty) expl3.sty is provided by dev-texlive/texlive-latex3, so texlive-latex3 should be added to the DEPEND list.
Created attachment 251979 [details, diff] add dev-texlive/texlive-latex3 to DEPEND list
dep added, thanks