Well, it looks like all of texlive broke for me. In a profile with texlive, I now get this:
$ pdflatex xyz.tex This is pdfTeX, Version 3.141592653-2.6-1.40.25 (TeX Live 2023/GNU Guix) (preloaded format=pdflatex) restricted \write18 enabled. kpathsea: Running mktexfmt pdflatex.fmt mktexfmt: mktexfmt is using the following fmtutil.cnf files (in precedence order): mktexfmt: mktexfmt is using the following fmtutil.cnf file for writing changes: mktexfmt: /home/enge/.texlive2023/texmf-config/web2c/fmtutil.cnf mktexfmt [INFO]: writing formats under /home/enge/.texlive2023/texmf-var/web2c mktexfmt [INFO]: Did not find entry for byfmt=pdflatex skipped mktexfmt [INFO]: total formats: 0 mktexfmt [INFO]: exiting with status 0 I can't find the format file `pdflatex.fmt'! Andreas
