Change cpython version

Is there any way to change the python version used by the buildpacks? I saw on the paketo buildpack documentation a possible way, but it does seem to work in my fly.toml file. It is posted below:

builder = “paketobuildpacks/builder:base”
value = “3.9.14”

@LowellVCM this worked for me

  builder = "paketobuildpacks/builder:base"
  buildpack = ["paketo-buildpacks/python"]