Yesterday I did "guix package --upgrade" and now, a simple latex file:

\documentclass{article}
\usepackage[T1]{fontenc}
\begin {document}
This is a test.
\end {document}

fails with 

/gnu/store/161gb51263qn8kydvdcd3jq6bcax3abf-texlive-texmf-minimal-2016/share/texmf-dist/web2c/mktexnam: Could not map source abbreviation  for ecrm1000.
/gnu/store/161gb51263qn8kydvdcd3jq6bcax3abf-texlive-texmf-minimal-2016/share/texmf-dist/web2c/mktexnam: Need to update ?
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input ecrm1000
This is METAFONT, Version 2.7182818 (TeX Live 2016) (preloaded base=mf)


kpathsea: Running mktexmf ecrm1000
! I can't find file `ecrm1000'.
<*> ...ljfour; mag:=1; nonstopmode; input ecrm1000
                                                  
Please type another input file name
! Emergency stop.
<*> ...ljfour; mag:=1; nonstopmode; input ecrm1000
                                                  
Transcript written on mfput.log.
grep: ecrm1000.log: No such file or directory
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input ecrm1000' failed to make ecrm1000.tfm.
kpathsea: Appending font creation commands to missfont.log.

! Font T1/cmr/m/n/10=ecrm1000 at 10.0pt not loadable: Metric (TFM) file not fou
nd.
<to be read again> 
                   relax 
l.105 \fontencoding\encodingdefault\selectfont



Rolling back my upgrade and it works fine.


J'


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