[NTG-context] Getting ToC to match page numbering

Hello all. I have set up page numbering for the bodymatter and appendices of my document with: \setuppagenumbering[way=bychapter,chapternumber=yes,numberseparator={/}] so that \completepagenumber in my footer lines shows, e.g. 1/3 for chapter 1 page 3. This works well for the actual page numbering, but in the table of contents the separator is shown as the default '-' rather than '/', and I can't seem to change it using separator={/}, numberseparator={/} or anything I can think of. Can anyone tell me how to get the table of contents to match the pages? Thanks! Duncan