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.
