Collecting sdss-tree==2.15.0
  1 location(s) to search for versions of sdss-tree:
  * https://pypi.python.org/simple/sdss-tree/
  Getting page https://pypi.python.org/simple/sdss-tree/
  Analyzing links from page https://pypi.python.org/simple/sdss-tree/
    Found link https://pypi.python.org/packages/2a/eb/317339d24efc5322f5535c7a65636a2b6cb091e7b586c7ea4c855e59682f/sdss_tree-2.15.2-py2.py3-none-any.whl#md5=10f91c2d810dc15ef9acf4c482cb28bc (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.2
    Found link https://pypi.python.org/packages/34/05/fb73cb0d698416dd16dc97666176c712553a201338a5e2a0500b7746e788/sdss-tree-2.15.0.tar.gz#md5=28b5829d5a856f95dbdcea2d38fa8357 (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.0
    Found link https://pypi.python.org/packages/70/37/98280b0bf7ca927de14ea8452857ef8d6d285b1fc4aa86eed75fa46a6dbf/sdss-tree-2.15.1.tar.gz#md5=1a57ecace42cea1c59a2d83d2f835c1c (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.1
    Found link https://pypi.python.org/packages/73/02/d883b2d61becc01bc9a6523b45b3ac36fc42c45b1b802848e6dae030dd00/sdss_tree-2.15.1-py2.py3-none-any.whl#md5=3923c028b2da35de8893684425c00cf8 (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.1
    Found link https://pypi.python.org/packages/7c/3d/c9ca8708afa080ae746f1b100892ed0121b7be0c3526cbf7a4fb96e8669b/sdss-tree-2.15.2.tar.gz#md5=408da1c9d60ebabb0ba3815b33439d36 (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.2
    Found link https://pypi.python.org/packages/9e/7f/f79bd54c90673c10d15fb8ce990bde3970ae84513f960613ee9cd31c285c/sdss_tree-2.15.0-py2.py3-none-any.whl#md5=7b2cec754294ddf1360375399a0afad5 (from https://pypi.python.org/simple/sdss-tree/), version: 2.15.0
  Using version 2.15.0 (newest of versions: 2.15.0)
  Downloading sdss_tree-2.15.0-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/9e/7f/f79bd54c90673c10d15fb8ce990bde3970ae84513f960613ee9cd31c285c/sdss_tree-2.15.0-py2.py3-none-any.whl#md5=7b2cec754294ddf1360375399a0afad5 (from https://pypi.python.org/simple/sdss-tree/)
  Saved /tmp/tmpdsgxa9oy/sdss_tree-2.15.0-py2.py3-none-any.whl
Skipping sdss-tree, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-3l4v2lq7/sdss-tree