docs: def _set_env_path_with_node_modules(self):
          """
          Attempt to locate and set the paths to the binary with the
          working directory defined for this instance.
          """
  
          modcls_name = ':'.join((
              self.__class__.__module__, self.__class__.__name__))
  
          if self.binary is None:
              raise ValueError(
                  "binary undefined for '%s' instance" % modcls_name)
  
          logger.debug(
              "locating '%s' node binary for %s instance...",
              self.binary, modcls_name,
          )
  
          default = self.which()
          if default is not None:
              logger.debug(
                  "found '%s'; "
                  "not modifying PATH environment variable in instance of '%s'.",
                  realpath(default), modcls_name)
              return True
  
          target = self.which_with_node_modules()
  
          if target:
              # Only setting the path specific for the binary; side effect
              # will be whoever else borrowing the _exec in here might not
              # get the binary they want.  That's why it's private.
              self.env_path = dirname(target)
              logger.debug(
                  "located '%s' binary at '%s'; setting PATH environment "
                  "variable for '%s' instance.",
                  self.binary, self.env_path, modcls_name
              )
              return True
          else:
              logger.debug(
                  "Unable to locate '%s'; not modifying PATH environment "
                  "variable for instance of '%s'.",
                  self.binary, modcls_name
              )
              return False