TeXLive 2013 packages will be available soon in [extra]: users upgrading from TeXLive 2012
will likely encounter the following error message when trying to use a
TeX engine (like latex, xelatex, luatex):
(Fatal format file error; I'm stymied)
You can recognize such a situation in the pacman output during installation:
>>> texlive: recreating all formats...
/usr/bin/fmtutil: line 395: /usr/share/texmf/texconfig/tcfmgr: No such file or directory
fmtutil: config file `fmtutil.cnf' not found.
done.
To solve the situation, the simplest solution if you did not do any
changes to files in /etc/texmf, is to overwrite configuration files
with the .pacnew files installed by pacman. The pacdiff utility
may be used for that purpose.
After merging the configuration files, run the following command:
fmtutil-sys --all > /dev/null
it should not return error messages: please open a bug report if you see any problems.
Removing TeXLive 2012 before installing TeXLive 2013 can also workaround the issue.