Package: texlive-math-extra Version: 2015.20151225-2 The command
\usepackage[<...>]{unicode-math} causes ! LaTeX Error: File `ucharcat.sty' not found. because per v0.8b (2015/09/09) LaTeX package unicode-math has introduced a dependency on LaTex package ucharcat that is not reflected in the dependences of Debian package texlive-math-extra.