I think this should be possible. I'm trying to follow: http://wiki.contextgarden.net/Fonts_in_LuaTex I have set OSFONTDIR and run mtxrun --script font --reload. The output looks like: MTXrun | fontnames: identifying tree font files with suffix otf MTXrun | fontnames: identifying tree font files with suffix OTF MTXrun | fontnames: 161 tree files identified, 0 hash entries added, runtime ... MTXrun | fontnames: 0 system files identified, 0 hash entries added, runtime 0.135 seconds MTXrun | fontnames: 60 files rejected due to clashes MTXrun | fontnames: 635 double lookups in mappings MTXrun | fontnames: 169 double lookups in fallbacks The next step, mtxrun --script fonts --list returns "not supported". I supposed that the documentation was wrong and finally struck on mtxrun --script fonts --list --pattern=* which seems to know of only one font file, though I have over 1000 in the folder.