[NTG-context] looking for fonts in a project's subdirectory

Hi, In order for some projects (mkiv) to be "self-contained", I want to put the used fonts inside the project directory. Putting them next to the .tex files works fine, but I would like to put them in a subdirectory, e.g., to have the following kind of structure: project/ fonts/ fontA.otf fontB.otf env.tex document1.tex document2.tex I could modify the OSFONTDIR environment variable before calling context, but that's not very editor-friendly. Is there any command or Lua code that I can put in my environment file env.tex forcing context to also look into the fonts subdirectory? Thanks, Vianney