hunk.code_window: ### Fixed
   - Fixed a bug in dependency resolution which led to installation errors.
   ## [0.8.4] - 2018-04-18
  
hunk.labels: keep keep keep add keep keep keep
hunk.after_edit: - Fixed a bug where malformed sdists would lead to dependency resolution failing.
  
hunk.file_path: CHANGELOG.md
hunk.type: add
file: class BaseInstaller:
  
      def install(self, package):
          raise NotImplementedError
  
      def update(self, source, target):
          raise NotImplementedError
  
      def remove(self, package):
          raise NotImplementedError
  