2020-09-12T20:18:28,565 Created temporary directory: /tmp/pip-ephem-wheel-cache-c0e8miqf
2020-09-12T20:18:28,568 Created temporary directory: /tmp/pip-req-tracker-ihus1h2_
2020-09-12T20:18:28,568 Initialized build tracking at /tmp/pip-req-tracker-ihus1h2_
2020-09-12T20:18:28,568 Created build tracker: /tmp/pip-req-tracker-ihus1h2_
2020-09-12T20:18:28,569 Entered build tracker: /tmp/pip-req-tracker-ihus1h2_
2020-09-12T20:18:28,569 Created temporary directory: /tmp/pip-wheel-7z91pa0e
2020-09-12T20:18:28,577 1 location(s) to search for versions of ff-ebook:
2020-09-12T20:18:28,577 * https://pypi.org/simple/ff-ebook/
2020-09-12T20:18:28,578 Fetching project page and analyzing links: https://pypi.org/simple/ff-ebook/
2020-09-12T20:18:28,578 Getting page https://pypi.org/simple/ff-ebook/
2020-09-12T20:18:28,580 Found index url https://pypi.org/simple
2020-09-12T20:18:28,670   Link requires a different Python (3.7.3 not in: '>=3.8,<4.0'): https://files.pythonhosted.org/packages/2c/1b/62c7de0b2d90fda96bc0f1ad541d31b4d44acf0371426afa955b046300b9/ff_ebook-0.3.0-py3-none-any.whl#sha256=9c263c7c9f5e644d9b9da46ee66da5d9ea97b13f93b05813171879cb2e9e57b2 (from https://pypi.org/simple/ff-ebook/) (requires-python:>=3.8,<4.0)
2020-09-12T20:18:28,671   Link requires a different Python (3.7.3 not in: '>=3.8,<4.0'): https://files.pythonhosted.org/packages/ed/fa/366ec93887e2fbda220d6ba11af34518ff7f4989155e75307c3edade4e21/ff_ebook-0.3.0.tar.gz#sha256=26d5e6a99361941f36b2aae2c501661bf8f9cecf44c35039ce8aa71ef2dd01d7 (from https://pypi.org/simple/ff-ebook/) (requires-python:>=3.8,<4.0)
2020-09-12T20:18:28,671 Given no hashes to check 0 links for project 'ff-ebook': discarding no candidates
2020-09-12T20:18:28,671 ERROR: Could not find a version that satisfies the requirement ff-ebook==0.3.0 (from versions: none)
2020-09-12T20:18:28,672 ERROR: No matching distribution found for ff-ebook==0.3.0
2020-09-12T20:18:28,672 Exception information:
2020-09-12T20:18:28,672 Traceback (most recent call last):
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/cli/base_command.py", line 228, in _main
2020-09-12T20:18:28,672     status = self.run(options, args)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/cli/req_command.py", line 182, in wrapper
2020-09-12T20:18:28,672     return func(self, options, args)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/commands/wheel.py", line 156, in run
2020-09-12T20:18:28,672     reqs, check_supported_wheels=True
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/legacy/resolver.py", line 183, in resolve
2020-09-12T20:18:28,672     discovered_reqs.extend(self._resolve_one(requirement_set, req))
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/legacy/resolver.py", line 388, in _resolve_one
2020-09-12T20:18:28,672     abstract_dist = self._get_abstract_dist_for(req_to_install)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/legacy/resolver.py", line 339, in _get_abstract_dist_for
2020-09-12T20:18:28,672     self._populate_link(req)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/legacy/resolver.py", line 305, in _populate_link
2020-09-12T20:18:28,672     req.link = self._find_requirement_link(req)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/legacy/resolver.py", line 270, in _find_requirement_link
2020-09-12T20:18:28,672     best_candidate = self.finder.find_requirement(req, upgrade)
2020-09-12T20:18:28,672   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/index/package_finder.py", line 928, in find_requirement
2020-09-12T20:18:28,672     req)
2020-09-12T20:18:28,672 pip._internal.exceptions.DistributionNotFound: No matching distribution found for ff-ebook==0.3.0
2020-09-12T20:18:28,676 Removed build tracker: '/tmp/pip-req-tracker-ihus1h2_'