// for symlinks. If the symlink leads to a keep mount, copy the manifest text
// from the keep mount into the output manifestText. Ensure that whether
// symlinks are relative or absolute, every symlink target (even targets that
-// are symlinks themselves) must either remain in the output directory or point
-// to a collection mount.
+// are symlinks themselves) must point to a path in either the output directory
+// or a collection mount.
//
// Assumes initial value of "path" is absolute, and located within runner.HostOutputDir.
func (runner *ContainerRunner) UploadOutputFile(