Collecting dagster==0.1.0rc1
  1 location(s) to search for versions of dagster:
  * https://pypi.python.org/simple/dagster/
  Getting page https://pypi.python.org/simple/dagster/
  Analyzing links from page https://pypi.org/simple/dagster/
    Found link https://files.pythonhosted.org/packages/1d/a9/8cefbb4a120c706ed892c1b18fe21ba137309e8f304177ece8d1fc1f1e59/dagster-0.1.0rc1-py3-none-any.whl#sha256=6f20a573bd7e0be703e679f971930d9ede0a3dc7efe8baf7ba3932460ba3f216 (from https://pypi.org/simple/dagster/), version: 0.1.0rc1
    Found link https://files.pythonhosted.org/packages/91/bc/a922937b4bdd2f95dd4753b2477aad1e7633417775a92b777f8ca285c3e6/dagster-0.1.0rc1.tar.gz#sha256=68a7f87d89b69a477a29ba5c456095b3977b24d09e925f41e96e7849ac6fc0a5 (from https://pypi.org/simple/dagster/), version: 0.1.0rc1
  Using version 0.1.0rc1 (newest of versions: 0.1.0rc1)
  Downloading https://files.pythonhosted.org/packages/1d/a9/8cefbb4a120c706ed892c1b18fe21ba137309e8f304177ece8d1fc1f1e59/dagster-0.1.0rc1-py3-none-any.whl (71kB)
  Downloading from URL https://files.pythonhosted.org/packages/1d/a9/8cefbb4a120c706ed892c1b18fe21ba137309e8f304177ece8d1fc1f1e59/dagster-0.1.0rc1-py3-none-any.whl#sha256=6f20a573bd7e0be703e679f971930d9ede0a3dc7efe8baf7ba3932460ba3f216 (from https://pypi.org/simple/dagster/)
  Saved /tmp/tmpylm4s_f3/dagster-0.1.0rc1-py3-none-any.whl
Skipping dagster, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-ntadaovm/dagster