2020-02-12T19:10:06 Created temporary directory: /tmp/pip-ephem-wheel-cache-c3pg1tm7
2020-02-12T19:10:06 Created temporary directory: /tmp/pip-req-tracker-e6ykxi1r
2020-02-12T19:10:06 Created requirements tracker '/tmp/pip-req-tracker-e6ykxi1r'
2020-02-12T19:10:06 Created temporary directory: /tmp/pip-wheel-evrf3jzb
2020-02-12T19:10:06 Collecting nbdev==0.2.9
2020-02-12T19:10:06   1 location(s) to search for versions of nbdev:
2020-02-12T19:10:06   * https://pypi.org/simple/nbdev/
2020-02-12T19:10:06   Getting page https://pypi.org/simple/nbdev/
2020-02-12T19:10:06   Analyzing links from page https://pypi.org/simple/nbdev/
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/47/53/843e7cab012542771c23d94d13860aa8f0ce2aad62752d1e0fd778371458/nbdev-0.0.1-py3-none-any.whl#sha256=fe2465dab83afab95bee3cd08bd54013a6caf208d5430abae8e73f869821228f (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/34/be/326d143b9e076b5161993e763131f33ae9e95a09ffd1a20ce4f39a692c52/nbdev-0.0.1.tar.gz#sha256=3aff8826c0ae74f1cddb2c5974848e7782347e8d46dda95e730e445cd81ab735 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/cb/5a/6187cf1f603cbd1d7f10997419fd9f6969c33a7075b859c50082d9aa7d6c/nbdev-0.0.2-py3-none-any.whl#sha256=a74839eeaa39d36c61922b17516112f9a82a760a9586b80452c01316eb299022 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/7e/23/9de77246d7ef27e03f6ba5089ec6ba8b4fab1f3356434bb1737de343b95e/nbdev-0.0.2.tar.gz#sha256=c4ba6c30787e2b749176d38abc4f7c3d6923b9305e87f5670a58084daae9c75b (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/c8/71/80bfb44c9c651525e2ddd5f98b4729756bf2d870b41d04801e67d25be5fb/nbdev-0.0.3-py3-none-any.whl#sha256=746c40e87a14d4c1ef0d23006b8db20406eaa6e8de07ff811960b85d857b9fc5 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/2c/93/406b7245a8cfb12fa7fc485d973fe6b61b6d6a70000b1f94e64f992ccab8/nbdev-0.0.3.tar.gz#sha256=9d56f9da14c1555dc408cc4ffee00c2c0c84238197d6d60fb6f534ef3f26962a (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.0.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/06/48/93ef1458b1c7769e961312bd66e34936771cf0882631603384b0071c90f5/nbdev-0.1.0-py3-none-any.whl#sha256=6104dfba81fea8f565c181f771ec09b9059d9333ca4e8ac2ef590a117d0ac424 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.0
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/e5/c4/0afed04454cc19097ee619c9b004897f7ac4f5e93389a4e08446c14fe7cc/nbdev-0.1.0.tar.gz#sha256=dbf2c4d21ac31b6dfd8d3fe5029e39bd6fec5c3af05cfe5b56a48e21ee60b7eb (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.0
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/3b/62/0d30b5346af51fca87644218a8740cb6c1fa1dab6fb643f811c099d80ecd/nbdev-0.1.1-py3-none-any.whl#sha256=54d80ceb09e9a76ec63a3f7a19c94f9ce931932b71774d90af8113f109f5a435 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/c9/04/f23e9f7be227b0ba1fbb34533ea53af6de5efa14b1fa01ea91160cbaf806/nbdev-0.1.1.tar.gz#sha256=c217db085a0409b368c6816d055c4e7c7791d2aa5af0969358983e10a04541d4 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/15/b5/818e1194a7234856174ecf3b567e00d77e1cf12cf608a76bf01e1cd725f3/nbdev-0.1.2-py3-none-any.whl#sha256=e0bb1ce312fc5b8f3e854c97d8401dc86581e0cdf748fa42d0b00926df0e54cb (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/9d/bf/8432feb929440324353256734b3e698988aec2280fa49273cf24c10a12f1/nbdev-0.1.2.tar.gz#sha256=d101d45c2ac63102c91dc1c749dba127f72931c68124b119800e21d60247a10a (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/07/28/1c63652ecf51447aab6062a6ce440fa9a1cfd8198015b45987d7be54803f/nbdev-0.1.3-py3-none-any.whl#sha256=d2b8f50efa45b47a8045d93b160a01e93d48832fbe5ff24070fa787799033b24 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/dc/5e/152fd3a9e7f5539cdf7a79af05a81c85e7740de5268e4e871a799880169b/nbdev-0.1.3.tar.gz#sha256=6d1f45f6ad6983525c9f6591f9f9dd8e198995a323c7d5aa4f3474af2c489133 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/27/a7/8e260c7db96fbdbfa8877e6af12ef79c127eb56884239b87fc283f1c0069/nbdev-0.1.4-py3-none-any.whl#sha256=cad2b83ed14f6baa506cf9d26fc3a992dad44715b14f1c44918d80c33e6b2a92 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.4
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/b5/9a/49dbdda14321d18f82581307d70c20a2c71822a565442163ab0c51ff60b7/nbdev-0.1.4.tar.gz#sha256=6f464c29e0a521481313e9e5185e6b81a09182f36196fa1401bec5b6143d31e9 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.4
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/04/44/0fa14867f76498599698526722c396dcd220b825cec059957fc5d5e2e2a2/nbdev-0.1.5-py3-none-any.whl#sha256=4b7056b909dbf6eb5512cd38c43946c2d2a73173fb90320fdf79ff1a630af9ea (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.5
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/76/ac/aab449c29c29db500db557603884e433351c581e55ac9f7c1345541846b4/nbdev-0.1.5.tar.gz#sha256=e9be535eb1728cc454a79e7b117df93120244ab0b085bc3b063f4c6e155f3198 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.5
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/8d/07/ea8852eebcb1b34e517cb12f34dd566a5f2e65066b6bcf54db1c33f27150/nbdev-0.1.6-py3-none-any.whl#sha256=17344da736d3ce9f1ed0c62d2a25e0bb08bafce9c9da1b77d37de2d1d7c27f0a (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.6
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/16/41/3646574d003a1b7b1bf176d37788f078c51dfec305eb15e823f8675adbea/nbdev-0.1.6.tar.gz#sha256=4b4eeb297bd8d3de9cbe3d8ea8d0bd96a5120d202b47836b447d240411421600 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.6
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/79/78/34ce4dfed26e59f5081e7184f35e27718b747cc9ac8d7c846fdde8be43e9/nbdev-0.1.7-py3-none-any.whl#sha256=8df520975e1bda015aa389fcce64f7cabe3efd08cd0fd57ddbf87aa10d534534 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.7
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/94/ab/833fd2567d5cf30d3cc7d971d4c9e3f7310fe5db3812acb8d9b0a356988e/nbdev-0.1.7.tar.gz#sha256=6ac05370ed75f94ba2a457db7a8416826c5ff003452c3062cbc557b9bc8a14c5 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.7
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/c1/44/d07daa10328817c3cc4c1dc7b98a4b124a3c194c2891474191671bb7fd39/nbdev-0.1.8-py3-none-any.whl#sha256=c5db2e6b373020afc658efb6736a740853d86f9558cf5ae3afde6e6c689175a7 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.8
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/06/b6/236a354f223498cc2fcafc98047663ce29e5531484c915ea40838fe6ff0f/nbdev-0.1.8.tar.gz#sha256=0053d3234e5ab1379841b6eff2a4cc3ab4529e3bb5dcacc13638b797a133a4c8 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.8
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/53/60/eebece5e5fbba154fac806a2a2b435d570488264971b980fb8e035621814/nbdev-0.1.9-py3-none-any.whl#sha256=851a3167a86e6dc3c400a4cba38547a9b629d3f7269b42ec1c03ce1400343d20 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.9
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/7d/b5/5040025b574c05b788edfea2c28e434ae9b31e4fa33dde84ab581e6fdca3/nbdev-0.1.9.tar.gz#sha256=75000b80df30230fd0cb7330330647e9cff3db5d0d006d621d7850d2d2c1ff98 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.9
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/e5/fe/bdf8c0acf19bab7390a4246c6f33f670c157dd3305987c5d055fb647438a/nbdev-0.1.10-py3-none-any.whl#sha256=708e885424f8a5f53d3e29241f1535c3cd33dc14f6819f4232801bd451f0ddef (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.10
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/64/ae/faea3cf251d307dfa7cf552dfb899c79992639fd0987b5dc44076865ee1c/nbdev-0.1.10.tar.gz#sha256=2aea0a28d90c3914905555c7a1cce08a3821e5e39281f26ca75fe789237bd6c6 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.1.10
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/3d/74/1f3d71f525926441639040f45acc9208db4a22436fefb97f80e900cd7817/nbdev-0.2.0-py3-none-any.whl#sha256=acbc340dac88aeed7d00f0edfbd177158698eae2c1a447b58b5f184283d3489a (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.0
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/07/23/9f5f06170c99292fd10df97426e8ac9c702942e9d74eb4695928b5625332/nbdev-0.2.0.tar.gz#sha256=6020b98518174ff7a2418139db924ea32efd6b5f1d808ade91de33b8ec8d81fc (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.0
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/be/76/5a3f51bc47c63c5c3752ba0a81198b9dc67a0c6d1976848ae581cc070906/nbdev-0.2.1-py3-none-any.whl#sha256=e883e460d44bf25320fdc865e8d5032dc1c886d0951cc8c7093305e23b8dd0a2 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/54/25/826a2022524e068f30853893fd6b9e2b40bd8c9aa117f63ef8b4c3870266/nbdev-0.2.1.tar.gz#sha256=ae52f5755b13be9ee13abd7316358566011a90bc459bf45ae2376621b8a119f9 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.1
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/a5/4e/952a3e3711878e533b0cf8ebf853742bd3369aac842365bb8393d729d712/nbdev-0.2.2-py3-none-any.whl#sha256=c19e1baa3ce8c96a8126cf77c8d79cb62622eb6a9c7ae54801baf54ef27de953 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/d1/6d/19dd41def55ed6af3f30441ab354887c8e5293b590dfd950575446827987/nbdev-0.2.2.tar.gz#sha256=cd7340e118014d6f301a518e8b2413d3d6f2f3e6b3018363fce56d9aeb1e2219 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.2
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/90/1b/dbe49ceadaebd01ee53b13a82a171cca4db9d2e3cd5ebe9c3cb5309c1b37/nbdev-0.2.3-py3-none-any.whl#sha256=3f434e3975a5a998d3674be6a5418d1f76e569005fbb0be1c10b4c77e8a8ffe3 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/63/c7/5559a47170448de84a5700d3e332fdfc60ca91d3755eff13ed8a9a041210/nbdev-0.2.3.tar.gz#sha256=c9430a06830a5f9c258eadb70da26eaf536c6275d55940387a4937b9e9e2c48b (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.3
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/95/3e/4901b2cd023f8fe5b3f7935e87162f1da362c2f59af51c1cd634a50bd4da/nbdev-0.2.4-py3-none-any.whl#sha256=1612a891ff32f9824687d472a6ba3cdec8e69e55deca97c06ada4f18e9c38411 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.4
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/75/06/1bc489c4fa1017dd14d7c2f8cfb5116d08ca6e68bc6bd0b52cad91eaf0b5/nbdev-0.2.4.tar.gz#sha256=22d1f88ac780cfeece5148657717dd2e0405e1050a5c3381a500ab17a58365ca (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.4
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/c0/03/7b96a0319342e4c27824ed9a268785df4235375580e41bf1961391456e2d/nbdev-0.2.5-py3-none-any.whl#sha256=6523ef0fdbc2f2f4fa7c85486c1c7329d6338ebbe0cf12f585380a3df55ec5cb (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.5
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/6e/63/f24aa5aed574b6922f08f8922c8e9bdbcde4d77e2818ba92671a200d0aa9/nbdev-0.2.5.tar.gz#sha256=e2785526b18eb46454c5d50d235dcaec90c020963cfbb86e06998e1c4ae290d4 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.5
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/57/f4/2294ae5b31117b613448664d7236456f4afde8a8ad45c626bd053c64d38c/nbdev-0.2.6-py3-none-any.whl#sha256=831fdd3262aee79deaf5f9572fe357908d20773972a6aa46d1d25d17af879ae4 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.6
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/08/ed/52affc4a26781ec0f69f303d86f0ebfcd4284de5cccbce1534fc240a2ce8/nbdev-0.2.6.tar.gz#sha256=0e5408463738cf15ae55c10bf04b8c30874c284941469757116da12aac67f4d6 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.6
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/63/86/43d85aa25752604dde997ff70c968c39a024c87abff763143c9bf80ff59e/nbdev-0.2.7-py3-none-any.whl#sha256=54057936d5c9d76822dd0a6bf787f4e01be72e28d15496eeb1c0f03ef314453f (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.7
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/ff/f1/d010e5a93b3a99ffb12ee4d56aad40e1b12b76f5e78fa04f53a538f3d8b9/nbdev-0.2.7.tar.gz#sha256=a7b1a6c32c917f77e38568054a78368882f1b4d18396c3c9b3f46a7415f0cb75 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.7
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/d4/0b/23e62685426dc0bcd82360f56b952242c82ba471cfc314505d7c5d25bb91/nbdev-0.2.8-py3-none-any.whl#sha256=febef82651a8743941ae0a8ebad67775859f28e19a9b2099f4e747ac3e798a5e (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.8
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/ca/43/433a52f8045b909d4023f992815fb7a91a7b0ff0964fc5fa71e162e1efa9/nbdev-0.2.8.tar.gz#sha256=f7c9c272dd60cfbcceef74cb97d4eea5f57b1df3bcc72f83fe230295dc2447ca (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.8
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/ce/86/e49e9f2baa3e220c09b4ca86d3403cb9094f19030f55177584de4e705bb1/nbdev-0.2.9-py3-none-any.whl#sha256=1501c53109a6eff6e14328172489bd3279c11106e808c23a7035836dd9ba45f9 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.9
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/ce/d9/1b71601dc796a17e747dd335daba6b7e6fd3f1949f7532fbe8d280759f8c/nbdev-0.2.9.tar.gz#sha256=dee0934e6285c7c550b31d62c770f8c7229f825fcf211b855912c139d32fe37e (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.9
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/b0/f9/00ca2feae994c17dfdda867f1cb5be7fa65f964fb9a3bfe58dee9740a221/nbdev-0.2.10-py3-none-any.whl#sha256=998237b4560da5adaf83058968353a9794388495296338e6191c9367078ae51c (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.10
2020-02-12T19:10:06     Found link https://files.pythonhosted.org/packages/45/ac/7deed4dccf26546c5c49ee9877a1ece026bb9ebf508485f580e9cd06a7d2/nbdev-0.2.10.tar.gz#sha256=1f3a0219efd04829d79bbfe60714c0ae00cbf3f4ef3c4a386efecf20263ae5ed (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6), version: 0.2.10
2020-02-12T19:10:06   Using version 0.2.9 (newest of versions: 0.2.9)
2020-02-12T19:10:06   Created temporary directory: /tmp/pip-unpack-pw31zc__
2020-02-12T19:10:06   Downloading https://files.pythonhosted.org/packages/ce/86/e49e9f2baa3e220c09b4ca86d3403cb9094f19030f55177584de4e705bb1/nbdev-0.2.9-py3-none-any.whl (43kB)
2020-02-12T19:10:06   Downloading from URL https://files.pythonhosted.org/packages/ce/86/e49e9f2baa3e220c09b4ca86d3403cb9094f19030f55177584de4e705bb1/nbdev-0.2.9-py3-none-any.whl#sha256=1501c53109a6eff6e14328172489bd3279c11106e808c23a7035836dd9ba45f9 (from https://pypi.org/simple/nbdev/) (requires-python:>=3.6)
2020-02-12T19:10:06   Saved /tmp/tmpl42gc2gu/nbdev-0.2.9-py3-none-any.whl
2020-02-12T19:10:06   Added nbdev==0.2.9 from https://files.pythonhosted.org/packages/ce/86/e49e9f2baa3e220c09b4ca86d3403cb9094f19030f55177584de4e705bb1/nbdev-0.2.9-py3-none-any.whl#sha256=1501c53109a6eff6e14328172489bd3279c11106e808c23a7035836dd9ba45f9 to build tracker '/tmp/pip-req-tracker-e6ykxi1r'
2020-02-12T19:10:06   Removed nbdev==0.2.9 from https://files.pythonhosted.org/packages/ce/86/e49e9f2baa3e220c09b4ca86d3403cb9094f19030f55177584de4e705bb1/nbdev-0.2.9-py3-none-any.whl#sha256=1501c53109a6eff6e14328172489bd3279c11106e808c23a7035836dd9ba45f9 from build tracker '/tmp/pip-req-tracker-e6ykxi1r'
2020-02-12T19:10:06 Skipping nbdev, due to already being wheel.
2020-02-12T19:10:06 Cleaning up...
2020-02-12T19:10:06   Removing source in /tmp/pip-wheel-evrf3jzb/nbdev
2020-02-12T19:10:06 Removed build tracker '/tmp/pip-req-tracker-e6ykxi1r'