docs: def can_use_cache(self, target: Target) -> bool:
          """Return True if should attempt to load `target` from cache.
             Return False if `target` has to be built, regardless of its cache
             status (because cache is disabled, or dependencies are dirty).
          """
          # if caching is disabled for this execution, then all targets are dirty
          if self.conf.no_build_cache:
              return False
          # if the target's `cachable` prop is falsy, then it is dirty
          if not target.props.cachable:
              return False
          # if any dependency of the target is dirty, then the target is dirty
          if any(self.targets[dep].is_dirty for dep in target.deps):
              return False
          # if the target has a dirty buildenv then it's also dirty
          if target.buildenv and self.targets[target.buildenv].is_dirty:
              return False
          return True