[NTG-context] Setup output name from within ConTeXt document

Dear ConTeXt community, Is it possible to set the file name of the output from within the document? I can do it on the command line by adding --result="CustomName.pdf", but I'd need to do it according to certain variables in the content of the file itself... Setupinteraction[title="CustomName.pdf"] will just set the internal pdf name, not the file system name. Thank you for your help! Best regards, Pascal