[NTG-context] Where is tex/texmf-context?

Dear list, Today I wanted to use ConTeXt MkIV instead of LMTX but when I ran context, I obtained the error mtxrun | unknown script 'context.lua' or 'mtx-context.lua' so I went to the installation directory /opt/context to check and noticed that tex/textmf-context was missing. I thought that obviously something must have went wrong with the last update, so I deleted the whole tree and ran the first-setup.sh again using sh ./first-setup.sh --context=latest --engine=luatex --modules=all --fonts=all but tex/texmf-context is still missing. Is any of the options I'm using for the install script broken? Cheers, Henri