[NTG-context] \definefontfamily not finding fonts

[Aditya Mahajan]

Did something change with regard to \definefontfamily recently. 

I have an old document where I use:

\starttypescript[mainface]
  \definefontfamily[mainface][rm][Libertinus Serif][features=default]
  \definefontfamily[mainface][ss] [heros]  [features=default] 
  \definefontfamily[mainface][tt] [dejavu] [features=none, rscale=0.85]
  \definefontfamily[mainface][mm] [LibertinusMath]
\stoptypescript

\setupbodyfont[mainface,12pt]

On the recent LMTX (2020.09.05) I get

selectfont      > the requested font 'Libertinus Serif' has no files for the 'tf' alternative, Latin Modern is used instead.
selectfont      > the requested font 'heros' has no files for the 'tf' alternative, Latin Modern is used instead.
selectfont      > the requested font 'dejavu' has no files for the 'tf' alternative, Latin Modern is used instead.
selectfont      > the requested font 'LibertinusMath' has no files for the 'tf' alternative, Latin Modern is used instead.


I can find the fonts using mtxrun --script fonts. For example:

$mtxrun --script fonts --list --pattern="LibertinusSerif" --all
identifier                       familyname                fontname                  filename                              subfont   instances

libertinusserif                  libertinusserif           libertinusserif           libertinusserif-regular.otf
libertinusserifdisplaynormal     libertinusserifdisplay    libertinusserifdisplay    libertinusserifdisplay-regular.otf
libertinusserifdisplayregular    libertinusserifdisplay    libertinusserifdisplay    libertinusserifdisplay-regular.otf
libertinusserifinitialsnormal    libertinusserifinitials   libertinusserifinitials   libertinusserifinitials-regular.otf
libertinusserifinitialsregular   libertinusserifinitials   libertinusserifinitials   libertinusserifinitials-regular.otf
libertinusserifnormal            libertinusserif           libertinusserifitalic     libertinusserif-italic.otf
libertinusserifregular           libertinusserif           libertinusserif           libertinusserif-regular.otf

and similar for the other fonts. 

Any idea on what is going on and how to debug.

Thanks,
Aditya