Dear experts,

I want to use ConTeXt MkIV as supplied by TeXlive 2021.
After installation, I ran "mtxrun --generate".
I also tried "context --generate".
Both create output in the wrong place.

The TeXlive documentation says that ConTeXt uses TEXMFCACHE,
which uses the default $TEXMFSYSVAR;$TEXMFVAR in my texmf.cnf.
My TEXMFSYSVAR is /var/opt/texlive, but ConTeXt doesn't use it.
Instead, it creates /opt/texmf-var and creates its output there.
I don't understand why it used that path; I've never used or configured it.

How can I convice ConTeXt to use TEXMFSYSVAR?

Or is this a question for the TeXlive folks?

Thanks for looking at this.