2026-03-17T21:43:18,296 Created temporary directory: /tmp/pip-ephem-wheel-cache-uptlvwpp
2026-03-17T21:43:18,298 Created temporary directory: /tmp/pip-build-tracker-_psbbfl4
2026-03-17T21:43:18,299 Initialized build tracking at /tmp/pip-build-tracker-_psbbfl4
2026-03-17T21:43:18,299 Created build tracker: /tmp/pip-build-tracker-_psbbfl4
2026-03-17T21:43:18,300 Entered build tracker: /tmp/pip-build-tracker-_psbbfl4
2026-03-17T21:43:18,300 Created temporary directory: /tmp/pip-wheel-cedaco68
2026-03-17T21:43:18,304 DEPRECATION: --no-binary currently disables reading from the cache of locally built wheels. In the future --no-binary will not influence the wheel cache. pip 23.1 will enforce this behaviour change. A possible replacement is to use the --no-cache-dir option. You can use the flag --use-feature=no-binary-enable-wheel-cache to test the upcoming behaviour. Discussion can be found at https://github.com/pypa/pip/issues/11453
2026-03-17T21:43:18,306 Created temporary directory: /tmp/pip-ephem-wheel-cache-08i5d5il
2026-03-17T21:43:18,328 Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
2026-03-17T21:43:18,331 2 location(s) to search for versions of iscc-schema:
2026-03-17T21:43:18,331 * https://pypi.org/simple/iscc-schema/
2026-03-17T21:43:18,331 * https://www.piwheels.org/simple/iscc-schema/
2026-03-17T21:43:18,332 Fetching project page and analyzing links: https://pypi.org/simple/iscc-schema/
2026-03-17T21:43:18,333 Getting page https://pypi.org/simple/iscc-schema/
2026-03-17T21:43:18,334 Found index url https://pypi.org/simple
2026-03-17T21:43:18,550 Fetched page https://pypi.org/simple/iscc-schema/ as application/vnd.pypi.simple.v1+json
2026-03-17T21:43:18,556   Found link https://files.pythonhosted.org/packages/3b/4d/f819578a5c0b30be0e05cb5574727d9dc42d01a634a105c9a2df47f650e6/iscc-schema-0.1.0.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.6.2,<4.0), version: 0.1.0
2026-03-17T21:43:18,557   Found link https://files.pythonhosted.org/packages/51/3f/a1a5159bcff99919b029c142183096e87fe60745054af50b340e439e05b7/iscc-schema-0.2.0.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.6.2,<4.0), version: 0.2.0
2026-03-17T21:43:18,558   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/67/18/44f3868c0f36ceac6d41bb36bfdd08d2f93894e41ff5d3a7c95a62771422/iscc_schema-0.2.0-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.6.2,<4.0)
2026-03-17T21:43:18,559   Found link https://files.pythonhosted.org/packages/0d/f4/0f24af350d307859e11c6971826cdd8360031554f78e44569a5fb0c7bdd8/iscc-schema-0.2.1.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.6.1,<4.0.0), version: 0.2.1
2026-03-17T21:43:18,560   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/45/d0/ef3f9337a2cebbe9e653a29b34d4bd4fc55b82f116afc80a7854f116b36d/iscc_schema-0.2.1-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.6.1,<4.0.0)
2026-03-17T21:43:18,561   Found link https://files.pythonhosted.org/packages/ae/77/2735d0717b591d5fda9a1c9848267e5761625e66a43263da6605d47ba40a/iscc-schema-0.3.0.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.0
2026-03-17T21:43:18,561   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/94/5f/403e2bb02f72564b5437d028c38c37e46642dabdf2b1031e2f1dafb4b6e6/iscc_schema-0.3.0-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,562   Found link https://files.pythonhosted.org/packages/f8/13/1b21e10c8cc63a1456911ffd955e67d70297adaff582112f02660f772d1a/iscc-schema-0.3.1.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.1
2026-03-17T21:43:18,564   Found link https://files.pythonhosted.org/packages/2b/6d/5a97f420af28fcaf769d0aaa0026d8b0a3b52bac4adf18b6e1b3bd10b960/iscc-schema-0.3.2.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.2
2026-03-17T21:43:18,565   Found link https://files.pythonhosted.org/packages/80/5d/04b9063546e4b5ff8d4978e150a01e69649735df53395fcb2b2fd50dc2b2/iscc-schema-0.3.3.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.3
2026-03-17T21:43:18,566   Found link https://files.pythonhosted.org/packages/a2/7d/821692967167827173e0d7d9c94b0c436ed762c4a24985017dd958272a2f/iscc-schema-0.3.4.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.4
2026-03-17T21:43:18,567   Found link https://files.pythonhosted.org/packages/58/02/789704b0f4f874b1e081327d515e8abc20ecaa0cb033ab0ea289f86e1351/iscc-schema-0.3.5.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.5
2026-03-17T21:43:18,568   Found link https://files.pythonhosted.org/packages/6d/89/9db616eceba51860df9b5481c78f8ee1ff3fff26a7dd0189a912c5350144/iscc-schema-0.3.6.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.6
2026-03-17T21:43:18,569   Found link https://files.pythonhosted.org/packages/d8/74/afe66ea92a3ee5d4d6b9a158155ea5dcc403d808f79202e106386ff3d829/iscc-schema-0.3.7.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.7
2026-03-17T21:43:18,570   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/87/8b/082539b9e41f15e852278c70463a0a11f38c4f8425639ed6a99ca7a97ebb/iscc_schema-0.3.7-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,571   Found link https://files.pythonhosted.org/packages/53/62/d2343e3e0dfb6334c0f203cf4ad1243133c763049250faf75fd5676b8ec4/iscc-schema-0.3.8.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.8
2026-03-17T21:43:18,571   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/29/f6/06a7534b4205efac51b9e1575713186355886e39b873485b1f11edccfbef/iscc_schema-0.3.8-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,572   Found link https://files.pythonhosted.org/packages/c4/79/2df7cd45a34f69d8e5b31682e02242811d73b14f5463ad0c97fdf74687d0/iscc-schema-0.3.9.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.3.9
2026-03-17T21:43:18,573   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/2b/81/ab990a6db12346ce2ce58cd22cc4aa9639721d5f52e135c54e5b2cde1755/iscc_schema-0.3.9-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,574   Found link https://files.pythonhosted.org/packages/43/9d/600fbc837157d4e8096a0aa72645d57eb98b1c41a54c2f0e2450086a4e88/iscc-schema-0.4.0.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.4.0
2026-03-17T21:43:18,574   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/61/b5/219890a529a4c0ced5022c75df291dee5e20c04016d0a872a94e8bcebc8e/iscc_schema-0.4.0-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,575   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/7a/83/71478a49b6d1e67c05bc86e19eceb92b111a331bb360ade20be608f28ed9/iscc_schema-0.4.1-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,576   Found link https://files.pythonhosted.org/packages/f8/ac/8429318eaa9834bc83264d6f058c7576dc6f60088647f39d9a10c930056e/iscc_schema-0.4.1.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0), version: 0.4.1
2026-03-17T21:43:18,576   Skipping link: No binaries permitted for iscc-schema: https://files.pythonhosted.org/packages/4e/77/aa393a0c08f3ab537e20fa8a929751a57479c59ec7bf969b97de2a0ac4e2/iscc_schema-0.5.0-py3-none-any.whl (from https://pypi.org/simple/iscc-schema/) (requires-python:<3.15,>=3.10)
2026-03-17T21:43:18,577   Found link https://files.pythonhosted.org/packages/15/f9/05b4634a5706b48d19ebb1ffa676dbf10a1287342734edcfcf7f509bab9c/iscc_schema-0.5.0.tar.gz (from https://pypi.org/simple/iscc-schema/) (requires-python:<3.15,>=3.10), version: 0.5.0
2026-03-17T21:43:18,579 Fetching project page and analyzing links: https://www.piwheels.org/simple/iscc-schema/
2026-03-17T21:43:18,579 Getting page https://www.piwheels.org/simple/iscc-schema/
2026-03-17T21:43:18,581 Found index url https://www.piwheels.org/simple
2026-03-17T21:43:18,739 Fetched page https://www.piwheels.org/simple/iscc-schema/ as text/html
2026-03-17T21:43:18,745   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.4.1-py3-none-any.whl#sha256=a6537441d097c3fcac68c72b37b1ba42bbdf6af5e4e9f42a29471c1bc81d4b47 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,745   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.4.0-py3-none-any.whl#sha256=414ef81124b7195b1a7a4a9a81fa3454b70d213a066d726657fc713068921cd6 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,746   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.9-py3-none-any.whl#sha256=e0b1d81b2e77bd3d7e2915f9191cdf014f7626dfef6409992013c57d7169dc02 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,746   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.8-py3-none-any.whl#sha256=52ae819a4e6d90dce2b49fb479a1deb1a5538d387348781ce3705e9c00d49924 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,747   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.7-py3-none-any.whl#sha256=e94ae266a5f65579798e8ce6f63ce46a7f510bea0f90e480c25d9fa1e5b2dc91 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,747   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.6-py3-none-any.whl#sha256=060020096272fbb6c7ca3da3969eb823553ed34ea818cdc58909c08a64e77144 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,748   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.5-py3-none-any.whl#sha256=7ff90c80a510ba95429a8c1060a1951139b38936e4cae7aa51e91e3076f54151 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,749   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.4-py3-none-any.whl#sha256=26afedbcd6b56a63976ed71f3caf69aaaa12f6971c0478e2927dc00bfb2542a4 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,750   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.3-py3-none-any.whl#sha256=bd5c6ab77ab9cba04100a48bac146652cdc0b9d47f758fbd7f997fd58c012990 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,750   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.2-py3-none-any.whl#sha256=20ffeb2a1e599984b2188e86edc54ed3a56d74b2a76fe05030594b275524a398 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,751   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.1-py3-none-any.whl#sha256=cb87734c27d2c6e3893b4f7872071fe6e53ca6b54e51309bee22a2262841357a (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,751   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.3.0-py3-none-any.whl#sha256=fe0e8de83d1f270f3bbcd43c4867557417c85e4ac1cf2981dc79717f87a43f90 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.7,<4.0.0)
2026-03-17T21:43:18,752   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.2.1-py3-none-any.whl#sha256=c744e96af404531219c74f2061468141370c5e6bcca9e2ff5ccf98a7998142a9 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.6.1,<4.0.0)
2026-03-17T21:43:18,753   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.2.0-py3-none-any.whl#sha256=3de86a0150cdb67f1eaf23712f13455468da52d33daccf25cde5c3cc69e78be1 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.6.2,<4.0)
2026-03-17T21:43:18,753   Skipping link: No binaries permitted for iscc-schema: https://archive1.piwheels.org/simple/iscc-schema/iscc_schema-0.1.0-py3-none-any.whl#sha256=d081d0d82d56507485f5049c241f9707d1266138fa367c79cb80ffbb5e6f8bc4 (from https://www.piwheels.org/simple/iscc-schema/) (requires-python:>=3.6.2,<4.0)
2026-03-17T21:43:18,754 Skipping link: not a file: https://www.piwheels.org/simple/iscc-schema/
2026-03-17T21:43:18,754 Skipping link: not a file: https://pypi.org/simple/iscc-schema/
2026-03-17T21:43:18,776 Given no hashes to check 1 links for project 'iscc-schema': discarding no candidates
2026-03-17T21:43:18,795 Collecting iscc-schema==0.5.0
2026-03-17T21:43:18,798   Created temporary directory: /tmp/pip-unpack-_asx2oeh
2026-03-17T21:43:19,007   Downloading iscc_schema-0.5.0.tar.gz (435 kB)
2026-03-17T21:43:19,382   Added iscc-schema==0.5.0 from https://files.pythonhosted.org/packages/15/f9/05b4634a5706b48d19ebb1ffa676dbf10a1287342734edcfcf7f509bab9c/iscc_schema-0.5.0.tar.gz to build tracker '/tmp/pip-build-tracker-_psbbfl4'
2026-03-17T21:43:19,387   Created temporary directory: /tmp/pip-build-env-f07zlm3w
2026-03-17T21:43:19,392   Installing build dependencies: started
2026-03-17T21:43:19,393   Running command pip subprocess to install build dependencies
2026-03-17T21:43:19,423   Error processing line 1 of /home/piwheels/.local/lib/python3.11/site-packages/cntimer.pth:

2026-03-17T21:43:19,463     Traceback (most recent call last):
2026-03-17T21:43:19,464       File "<frozen site>", line 192, in addpackage
2026-03-17T21:43:19,464       File "<string>", line 1, in <module>
2026-03-17T21:43:19,465     ModuleNotFoundError: No module named 'cntimer'

2026-03-17T21:43:19,466   Remainder of file ignored
2026-03-17T21:43:20,557   Using pip 23.0.1 from /usr/lib/python3/dist-packages/pip (python 3.11)
2026-03-17T21:43:21,137   DEPRECATION: --no-binary currently disables reading from the cache of locally built wheels. In the future --no-binary will not influence the wheel cache. pip 23.1 will enforce this behaviour change. A possible replacement is to use the --no-cache-dir option. You can use the flag --use-feature=no-binary-enable-wheel-cache to test the upcoming behaviour. Discussion can be found at https://github.com/pypa/pip/issues/11453
2026-03-17T21:43:21,160   Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
2026-03-17T21:43:21,672   Collecting hatchling
2026-03-17T21:43:21,773     Using cached https://www.piwheels.org/simple/hatchling/hatchling-1.29.0-py3-none-any.whl (76 kB)
2026-03-17T21:43:21,974   Collecting packaging>=24.2
2026-03-17T21:43:21,991     Using cached https://www.piwheels.org/simple/packaging/packaging-26.0-py3-none-any.whl (74 kB)
2026-03-17T21:43:22,110   Collecting pathspec>=0.10.1
2026-03-17T21:43:22,124     Using cached https://www.piwheels.org/simple/pathspec/pathspec-1.0.4-py3-none-any.whl (55 kB)
2026-03-17T21:43:22,243   Collecting pluggy>=1.0.0
2026-03-17T21:43:22,262     Using cached https://www.piwheels.org/simple/pluggy/pluggy-1.6.0-py3-none-any.whl (20 kB)
2026-03-17T21:43:22,504   Collecting trove-classifiers
2026-03-17T21:43:22,518     Using cached https://www.piwheels.org/simple/trove-classifiers/trove_classifiers-2026.1.14.14-py3-none-any.whl (14 kB)
2026-03-17T21:43:25,209   Installing collected packages: trove-classifiers, pluggy, pathspec, packaging, hatchling
2026-03-17T21:43:25,247     Creating /tmp/pip-build-env-f07zlm3w/overlay/local/bin
2026-03-17T21:43:25,249     changing mode of /tmp/pip-build-env-f07zlm3w/overlay/local/bin/trove-classifiers to 755
2026-03-17T21:43:26,189     changing mode of /tmp/pip-build-env-f07zlm3w/overlay/local/bin/hatchling to 755
2026-03-17T21:43:26,225   Successfully installed hatchling-1.29.0 packaging-26.0 pathspec-1.0.4 pluggy-1.6.0 trove-classifiers-2026.1.14.14
2026-03-17T21:43:26,474   Installing build dependencies: finished with status 'done'
2026-03-17T21:43:26,483   Getting requirements to build wheel: started
2026-03-17T21:43:26,484   Running command Getting requirements to build wheel
2026-03-17T21:43:26,844   Getting requirements to build wheel: finished with status 'done'
2026-03-17T21:43:26,848   Created temporary directory: /tmp/pip-modern-metadata-6ckds_h1
2026-03-17T21:43:26,851   Preparing metadata (pyproject.toml): started
2026-03-17T21:43:26,852   Running command Preparing metadata (pyproject.toml)
2026-03-17T21:43:27,451   Preparing metadata (pyproject.toml): finished with status 'done'
2026-03-17T21:43:27,456   Source in /tmp/pip-wheel-cedaco68/iscc-schema_6842c45fa1da4815ba637498da5845aa has version 0.5.0, which satisfies requirement iscc-schema==0.5.0 from https://files.pythonhosted.org/packages/15/f9/05b4634a5706b48d19ebb1ffa676dbf10a1287342734edcfcf7f509bab9c/iscc_schema-0.5.0.tar.gz
2026-03-17T21:43:27,456   Removed iscc-schema==0.5.0 from https://files.pythonhosted.org/packages/15/f9/05b4634a5706b48d19ebb1ffa676dbf10a1287342734edcfcf7f509bab9c/iscc_schema-0.5.0.tar.gz from build tracker '/tmp/pip-build-tracker-_psbbfl4'
2026-03-17T21:43:27,462 Created temporary directory: /tmp/pip-unpack-p4sdxypa
2026-03-17T21:43:27,463 Building wheels for collected packages: iscc-schema
2026-03-17T21:43:27,467   Created temporary directory: /tmp/pip-wheel-nwuvkt1z
2026-03-17T21:43:27,467   Destination directory: /tmp/pip-wheel-nwuvkt1z
2026-03-17T21:43:27,469   Building wheel for iscc-schema (pyproject.toml): started
2026-03-17T21:43:27,471   Running command Building wheel for iscc-schema (pyproject.toml)
2026-03-17T21:43:27,602   Building wheel for iscc-schema (pyproject.toml): finished with status 'done'
2026-03-17T21:43:27,606   Created wheel for iscc-schema: filename=iscc_schema-0.5.0-py3-none-any.whl size=52892 sha256=40cce0748479bce262544b46377cb02f4594215d0e0635c3dd9ab8191b7fa77d
2026-03-17T21:43:27,608   Stored in directory: /tmp/pip-ephem-wheel-cache-08i5d5il/wheels/ce/d8/4a/3e54144f57a9dd9d908df5140da0b9eb13ec53f8659e964fd7
2026-03-17T21:43:27,618 Successfully built iscc-schema
2026-03-17T21:43:27,623 Removed build tracker: '/tmp/pip-build-tracker-_psbbfl4'