This is now fixed:
--8<---------------cut here---------------start------------->8---
$ guix shell texlive-collection-latexrecommended -- pdflatex latex.tex
pdflatex latex.tex
This is pdfTeX, Version 3.141592653-2.6-1.40.25 (TeX Live 2023/GNU Guix)
(preloaded format=pdflatex)
restricted \write18 enabled.
entering extended mode
(./latex.tex
LaTeX2e <2022-11-01> patch level 1
L3 programming layer <2023-02-22>
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrlttr2.cls
Document Class: scrlttr2 2022/10/12 v3.38 KOMA-Script document class (letter)
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrkbase.sty
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrbase.sty
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrlfile.sty
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrlfile-hook.sty
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrlogo.sty)))
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/graphics/keyval.sty)))
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/scrsize12pt.clo)
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/typearea.sty))
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/koma-script/DIN.lco)
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/base/inputenc.sty)
Class scrlttr2 Warning: \date changes the internal \LaTeX date only.
(scrlttr2) You should note that this changes the default
(scrlttr2) value of variable `date' only as long as nobody
(scrlttr2) uses `\setkomavar` to change the content of
(scrlttr2) variable `date'.
(scrlttr2) Therefore, usage of `\setkomavar' is recommended
(scrlttr2) to change the letter's date on input line 6.
(/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/tex/latex/l3backend/l3backend-pdftex.def)
No file latex.aux.
[1{/gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/fonts/map/pdftex/updmap/pdftex.map}]
(./latex.aux)
)</gnu/store/k6d1433yxpb1g3whfdh1h5pmf4bnmlzg-profile/share/texmf-dist/fonts/type1/public/amsfonts/cm/cmr12.pfb>
Output written on latex.pdf (1 page, 16397 bytes).
Transcript written on latex.log.
--8<---------------cut here---------------end--------------->8---
The resulting document looks fine to me.
--
Ricardo
