2025-09-15T12:45:16,684 Created temporary directory: /tmp/pip-build-tracker-kds3idp8 2025-09-15T12:45:16,685 Initialized build tracking at /tmp/pip-build-tracker-kds3idp8 2025-09-15T12:45:16,685 Created build tracker: /tmp/pip-build-tracker-kds3idp8 2025-09-15T12:45:16,686 Entered build tracker: /tmp/pip-build-tracker-kds3idp8 2025-09-15T12:45:16,686 Created temporary directory: /tmp/pip-wheel-z7stw7b8 2025-09-15T12:45:16,690 Created temporary directory: /tmp/pip-ephem-wheel-cache-5zuj5ohy 2025-09-15T12:45:16,750 Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple 2025-09-15T12:45:16,753 2 location(s) to search for versions of returnn: 2025-09-15T12:45:16,753 * https://pypi.org/simple/returnn/ 2025-09-15T12:45:16,753 * https://www.piwheels.org/simple/returnn/ 2025-09-15T12:45:16,753 Fetching project page and analyzing links: https://pypi.org/simple/returnn/ 2025-09-15T12:45:16,754 Getting page https://pypi.org/simple/returnn/ 2025-09-15T12:45:16,755 Found index url https://pypi.org/simple/ 2025-09-15T12:45:16,881 Fetched page https://pypi.org/simple/returnn/ as application/vnd.pypi.simple.v1+json 2025-09-15T12:45:17,083 Skipping link: No binaries permitted for returnn: https://files.pythonhosted.org/packages/6e/89/655602190ae5f7a357f384ad51855b1f69763aee991113b9bf7227abf23d/returnn-1.0.0-py3-none-any.whl (from https://pypi.org/simple/returnn/) 2025-09-15T12:45:17,084 Found link https://files.pythonhosted.org/packages/23/d2/70be82368f4b3f54138056aec1a1572318d5020343804c4a8eadf9162812/returnn-1.0.0.tar.gz (from https://pypi.org/simple/returnn/), version: 1.0.0 2025-09-15T12:45:17,084 Found link https://files.pythonhosted.org/packages/0a/23/db1f532401c3ca6fac17ce12131350262246532e00b16d6546d6620ec50d/returnn-1.20190513.131010.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190513.131010 2025-09-15T12:45:17,085 Found link 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