Ah sorry, my bad. I thought that "mtxrunjit" was removed longer ago, but I only removed it from TeX Live in June 2025. Regardless, you should use the "context" command to compile files with ConTeXt. Example:
$ cat <<EOF > hello-world.tex
\starttext
Hello, world!
\stoptext
EOF
$ context hello-world.tex
[...]
system > ConTeXt ver: 2026.02.19 11:49 LMTX fmt: 2026.3.7 int: english/english
[...]
system | total runtime: 0.632 seconds of 0.768 seconds
$ pdftotext hello-world.pdf - | tail -1
Hello, world!
