I would like to modify this to only display file completion when I call vared from a certain function, how can I do it?

I tried with:

zstyle ':completion::complete:-value-*:*' completer _files

and

zstyle ':completion::complete:*' completer _files

but 

 use-compctl    (_default _value _value _in_vared)

is still there, and I get various completion suggestion that aren't files (or folders) in the current directory, such as environment variable names, executable names, etc

thanks