Build failure for pymupdf==1.26.6 in pipeline

[Armasse]

Description of the bug

I'm encountering a build error when installing pymupdf==1.26.6 in my CI pipeline.
I'm using Poetry 1.8.3 and an Alpine Docker image for the pipeline.

With 1.26.5, it works but not for 1.26.6.

The error message suggests that the issue originates from the build backend and is likely related to PyMuPDF not supporting PEP 517 builds:

Note: This error originates from the build backend, and is likely not a problem with poetry but with pymupdf (1.26.6) not supporting PEP 517 builds. 
You can verify this by running 'pip wheel --no-cache-dir --use-pep517 "pymupdf (==1.26.6)"'.

Did you have an idea why ?

How to reproduce the bug

I try to reproduce in my dev environment but I didn't encountered the error. Possibly a problem with the cache.

PyMuPDF version

1.26.6

Operating system

Linux

Python version

3.12

[julian-smith-artifex-com]

The PyMuPDF build does support PEP 517.

We'll need more information to make progress here:

• Full details of your system, e.g. the output from uname a- - usually Linux can use wheels directly from pypi.org, without building locally.
• The exact build/install command you are using. Please use pip -v or similar to show build details.
• The full output from your build/install command.