The missing file is in texlive-lang-greek, however it might be a good idea to trigger puenc.def's condition
\ifx\textBeta\@undefined so that it is not included.
- Bug#1052881: embree: FTBFS: ! LaTeX Error: File `puenc-gre... Lucas Nussbaum
- Bug#1052881: embree: FTBFS: ! LaTeX Error: File `puen... Bastian Germann