Hello Guix,

Attached patch on top of version-1.4.0 attempts to typset PDF docs for the
metamath package. However, the below error results, which seems to indicate
that the Euler fonts are not found, despite texlive-amsfonts existing in the
texlive-updmap.cfg input.

    (/gnu/store/s952x1vkbbcprklzlzimn3m2dn53mjx9-texlive-amsfonts-59745/share/texmf-dist/tex/latex/amsfonts/ueuf.fd)
    kpathsea: Running mktextfm eufm10
    mkdir: cannot create directory ?././homeless-shelter?: Permission denied
    mktextfm: mktexdir /homeless-shelter/.texlive2021/texmf-var/fonts/tfm/ams/euler failed.
    kpathsea: Appending font creation commands to missfont.log.
    
    ! Font U/euf/m/n/10=eufm10 at 10.0pt not loadable: Metric (TFM) file not found.
    <to be read again>

Can you reproduce, or is this some simple PEBKAC error?