I tried manually specifying this format file, but then get this error:

```
$ context --fmt=/opt/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt /tmp/test.tex
startup error : missing find_format_file callback
```

So I'm no longer convinced installation fully succeeded.

Sincerely,
Bryan Kaplan