2021-05-04T17:50:09,996 Created temporary directory: /tmp/pip-ephem-wheel-cache-33lc9wcw
2021-05-04T17:50:10,000 Created temporary directory: /tmp/pip-req-tracker-kibw5ys4
2021-05-04T17:50:10,000 Initialized build tracking at /tmp/pip-req-tracker-kibw5ys4
2021-05-04T17:50:10,000 Created build tracker: /tmp/pip-req-tracker-kibw5ys4
2021-05-04T17:50:10,001 Entered build tracker: /tmp/pip-req-tracker-kibw5ys4
2021-05-04T17:50:10,001 Created temporary directory: /tmp/pip-wheel-26k6eln8
2021-05-04T17:50:10,037 1 location(s) to search for versions of backtracked:
2021-05-04T17:50:10,037 * https://pypi.org/simple/backtracked/
2021-05-04T17:50:10,037 Fetching project page and analyzing links: https://pypi.org/simple/backtracked/
2021-05-04T17:50:10,038 Getting page https://pypi.org/simple/backtracked/
2021-05-04T17:50:10,039 Found index url https://pypi.org/simple
2021-05-04T17:50:10,149   Link requires a different Python (3.7.3 not in: '>=3.8'): https://files.pythonhosted.org/packages/51/9f/4b797828482530b14d7a2e05e6a95163961f4dad9cf9e7557c0a2a18f18d/backtracked-0.1.0-py3-none-any.whl#sha256=8447023aaef6dea12816e97561eb3b299b2be78f4a899f2b8b13a422eb74a332 (from https://pypi.org/simple/backtracked/) (requires-python:>=3.8)
2021-05-04T17:50:10,150   Link requires a different Python (3.7.3 not in: '>=3.8'): https://files.pythonhosted.org/packages/7d/6d/bd22f1e5a0ba9d17f4d6586cf569946616b9bf7f28d62b796c3174d7c0b9/backtracked-0.1.0.tar.gz#sha256=e1afc9fb51a4e5d22b11aed8f3318ad194a8f81850ee6dce18fe0b0d92425b9f (from https://pypi.org/simple/backtracked/) (requires-python:>=3.8)
2021-05-04T17:50:10,150   Link requires a different Python (3.7.3 not in: '>=3.8'): https://files.pythonhosted.org/packages/d5/74/cf58f4ad9f556e3f6f409d1df04e8a5cd200efbd5be018375274cc66a00d/backtracked-0.1.1-py3-none-any.whl#sha256=040c59e41af5913aabb507d3a0fbe8f3ef2adb23d1f7d28aef75247cd4f42ccf (from https://pypi.org/simple/backtracked/) (requires-python:>=3.8)
2021-05-04T17:50:10,151   Link requires a different Python (3.7.3 not in: '>=3.8'): https://files.pythonhosted.org/packages/eb/a9/47d1cab80319457954f535e91e01c95c9e8260c7efb9bc9d962dc8893a46/backtracked-0.1.1.tar.gz#sha256=32c57e653d8d634d57d85e490eb297feea27b2c9658c9e0af090b1f5c77de559 (from https://pypi.org/simple/backtracked/) (requires-python:>=3.8)
2021-05-04T17:50:10,151 Skipping link: not a file: https://pypi.org/simple/backtracked/
2021-05-04T17:50:10,152 Given no hashes to check 0 links for project 'backtracked': discarding no candidates
2021-05-04T17:50:10,152 ERROR: Could not find a version that satisfies the requirement backtracked==0.1.1 (from versions: none)
2021-05-04T17:50:10,153 ERROR: No matching distribution found for backtracked==0.1.1
2021-05-04T17:50:10,153 Exception information:
2021-05-04T17:50:10,153 Traceback (most recent call last):
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 341, in resolve
2021-05-04T17:50:10,153     name, crit = self._merge_into_criterion(r, parent=None)
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 173, in _merge_into_criterion
2021-05-04T17:50:10,153     raise RequirementsConflicted(criterion)
2021-05-04T17:50:10,153 pip._vendor.resolvelib.resolvers.RequirementsConflicted: Requirements conflict: SpecifierRequirement('backtracked==0.1.1')
2021-05-04T17:50:10,153 
2021-05-04T17:50:10,153 During handling of the above exception, another exception occurred:
2021-05-04T17:50:10,153 
2021-05-04T17:50:10,153 Traceback (most recent call last):
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/resolvelib/resolver.py", line 128, in resolve
2021-05-04T17:50:10,153     requirements, max_rounds=try_to_avoid_resolution_too_deep
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 473, in resolve
2021-05-04T17:50:10,153     state = resolution.resolve(requirements, max_rounds=max_rounds)
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/resolvelib/resolvers.py", line 343, in resolve
2021-05-04T17:50:10,153     raise ResolutionImpossible(e.criterion.information)
2021-05-04T17:50:10,153 pip._vendor.resolvelib.resolvers.ResolutionImpossible: [RequirementInformation(requirement=SpecifierRequirement('backtracked==0.1.1'), parent=None)]
2021-05-04T17:50:10,153 
2021-05-04T17:50:10,153 The above exception was the direct cause of the following exception:
2021-05-04T17:50:10,153 
2021-05-04T17:50:10,153 Traceback (most recent call last):
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/cli/base_command.py", line 180, in _main
2021-05-04T17:50:10,153     status = self.run(options, args)
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/cli/req_command.py", line 204, in wrapper
2021-05-04T17:50:10,153     return func(self, options, args)
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/commands/wheel.py", line 143, in run
2021-05-04T17:50:10,153     reqs, check_supported_wheels=True
2021-05-04T17:50:10,153   File "/usr/local/lib/python3.7/dist-packages/pip/_internal/resolution/resolvelib/resolver.py", line 136, in resolve
2021-05-04T17:50:10,153     raise error from e
2021-05-04T17:50:10,153 pip._internal.exceptions.DistributionNotFound: No matching distribution found for backtracked==0.1.1
2021-05-04T17:50:10,165 Removed build tracker: '/tmp/pip-req-tracker-kibw5ys4'