Created temporary directory: /tmp/pip-ephem-wheel-cache-9z67gsdq
Created temporary directory: /tmp/pip-req-tracker-puyuafow
Created requirements tracker '/tmp/pip-req-tracker-puyuafow'
Created temporary directory: /tmp/pip-wheel-gpekpi62
Collecting zk==0.6.3
  1 location(s) to search for versions of zk:
  * https://pypi.org/simple/zk/
  Getting page https://pypi.org/simple/zk/
  Analyzing links from page https://pypi.org/simple/zk/
    Found link https://files.pythonhosted.org/packages/b7/28/b607c779681583a36063c21de12a073de40e3d2b6243706d20b96efac527/zk-0.5.3.tar.gz#sha256=cf5b947ecc118d0e40194fcb47bd7caf19585c014229a25033e66f9883c4d29d (from https://pypi.org/simple/zk/), version: 0.5.3
    Found link https://files.pythonhosted.org/packages/b3/9a/7fb1045f9a8565ac7ba97113b3b5ba5802a081c6906ec223d68872bc1720/zk-0.5.6-py3-none-any.whl#sha256=407192851b1fb3287b84f6fee884c6f467bd12cda783cbb4921cd170e06eb89f (from https://pypi.org/simple/zk/), version: 0.5.6
    Found link https://files.pythonhosted.org/packages/88/f9/cb3bba69ddeacdf85618c85512520e1137c5cde30076022ff6f65d1c88bb/zk-0.5.6.tar.gz#sha256=dc46f552ceff4f1f21c0438f580e43ab4e6e5f616520ed1a6ebcfbad47c20cf1 (from https://pypi.org/simple/zk/), version: 0.5.6
    Found link https://files.pythonhosted.org/packages/f1/c6/4662f222bf57b3cc799a067f344c06721b2882f6b1af0f983771cdfe9ef8/zk-0.6.0-py3-none-any.whl#sha256=6d8902e81abffce7dc6b34bd2d2213fcbdae696320d115ff5e8df377ead5d579 (from https://pypi.org/simple/zk/), version: 0.6.0
    Found link https://files.pythonhosted.org/packages/52/e1/2d2dc972a550ae5ba43a58c19d49687f48f1f2078593a4d8d1f695ad655c/zk-0.6.0.tar.gz#sha256=e57780cf1aa20d9fbb7cea5c80c636e794f1b4ca61860d50f9ec8e06e9016d49 (from https://pypi.org/simple/zk/), version: 0.6.0
    Found link https://files.pythonhosted.org/packages/92/dc/4193668ba414e91205566aca2264eae88c48fb4e8e95d9e5554768f2fac0/zk-0.6.1-py3-none-any.whl#sha256=2b5ea6eb8c0e0ba489d3dfd97bbe778812f8cfdd0ba69a3f19e729181980302b (from https://pypi.org/simple/zk/), version: 0.6.1
    Found link https://files.pythonhosted.org/packages/b4/50/d92c36fa4673288f4bc6460d78941e7a922922ee406374eef3ec5a4d3574/zk-0.6.1.tar.gz#sha256=a21e5c6c8f3bf4d9c0b8efb2696f2a292cfef1de268b4b4470507c275a33d162 (from https://pypi.org/simple/zk/), version: 0.6.1
    Found link https://files.pythonhosted.org/packages/97/d4/f332b388055ed6ba380b61f2efb55bbbfc59c3e0cf3c9a1cbb2354c9c482/zk-0.6.2-py3-none-any.whl#sha256=ea0b21d269e7e399fd8f1be8219385ead388f14b4459ef620ad8d41c83e7215a (from https://pypi.org/simple/zk/), version: 0.6.2
    Found link https://files.pythonhosted.org/packages/c4/cd/7f84400e880d0eff173b45e491c790018487bbbaca60fb5ec334f69441ad/zk-0.6.2.tar.gz#sha256=15b16ad47ca68a9a13f17153f8a276c7df7308423b1a2f1d1419e12ad501031b (from https://pypi.org/simple/zk/), version: 0.6.2
    Found link https://files.pythonhosted.org/packages/5e/d3/eb76c4358bbe00e072fa64321eb85c9f9aa89bf5fbe84fb737faff8aa216/zk-0.6.3-py3-none-any.whl#sha256=bfcb08e08b71a6d896529700e51688ac051c359356bf3477d0da62328fdacc58 (from https://pypi.org/simple/zk/), version: 0.6.3
    Found link https://files.pythonhosted.org/packages/25/96/f043510b370982b9b0a54b027169774016f5ecb9b4e6e3e63af7352f9d95/zk-0.6.3.tar.gz#sha256=073cd8038981432e3ebe850922139efca663b3a941ba3b841fdca23461648e03 (from https://pypi.org/simple/zk/), version: 0.6.3
  Using version 0.6.3 (newest of versions: 0.6.3)
  Created temporary directory: /tmp/pip-unpack-asnw3d93
  Downloading https://files.pythonhosted.org/packages/5e/d3/eb76c4358bbe00e072fa64321eb85c9f9aa89bf5fbe84fb737faff8aa216/zk-0.6.3-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/5e/d3/eb76c4358bbe00e072fa64321eb85c9f9aa89bf5fbe84fb737faff8aa216/zk-0.6.3-py3-none-any.whl#sha256=bfcb08e08b71a6d896529700e51688ac051c359356bf3477d0da62328fdacc58 (from https://pypi.org/simple/zk/)
  Saved /tmp/tmprk76i9ft/zk-0.6.3-py3-none-any.whl
  Added zk==0.6.3 from https://files.pythonhosted.org/packages/5e/d3/eb76c4358bbe00e072fa64321eb85c9f9aa89bf5fbe84fb737faff8aa216/zk-0.6.3-py3-none-any.whl#sha256=bfcb08e08b71a6d896529700e51688ac051c359356bf3477d0da62328fdacc58 to build tracker '/tmp/pip-req-tracker-puyuafow'
  Removed zk==0.6.3 from https://files.pythonhosted.org/packages/5e/d3/eb76c4358bbe00e072fa64321eb85c9f9aa89bf5fbe84fb737faff8aa216/zk-0.6.3-py3-none-any.whl#sha256=bfcb08e08b71a6d896529700e51688ac051c359356bf3477d0da62328fdacc58 from build tracker '/tmp/pip-req-tracker-puyuafow'
Skipping zk, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-gpekpi62/zk
Removed build tracker '/tmp/pip-req-tracker-puyuafow'