Yes, we also see this in the CI for optional packages 
- https://github.com/sagemath/sage/actions/runs/2632874850

This is fallout from upgrading setuptools 
in https://trac.sagemath.org/ticket/33866

Looks like this is already fixed in upstream symengine.py. I've 
opened https://trac.sagemath.org/ticket/34141 


On Saturday, July 9, 2022 at 1:41:58 PM UTC-7 marc....@gmail.com wrote:

> When I tried to build 9.7.beta4 on an M1 mac mini with macOS 12.4 using no 
> external libraries except the Homebrew gfortran I got this error:
>
>  
>
>
>
>
>
> * error: Multiple top-level packages discovered in a flat-layout: 
> ['cmake', 'symengine'].  To avoid accidental inclusion of unwanted files or 
> directories,  setuptools will not proceed with this build.  If you are 
> trying to create a single distribution with multiple packages  on purpose, 
> you should not rely on automatic discovery.*
>
> Indeed, the symengine setup.py does not specify any packages, so pip tries 
> to automatically discover the packages and it decides that the cmake 
> directory is a package.
>
> I don't seem to have the option of attaching the log file, but it does not 
> have much more information than what is above.
>
> - Marc
>
> On Friday, July 8, 2022 at 4:22:21 PM UTC-5 Volker Braun wrote:
>
>> As always, you can get the latest beta version from the "develop" git 
>> branch. Alternatively, the self-contained source tarball is at 
>> http://www.sagemath.org/download-latest.html
>>
>> 843eb03e7e (tag: 9.7.beta4, trac/develop) Updated SageMath version to 
>> 9.7.beta4
>> 232d0434cf Trac #33866: Make jupyter_packaging standard; add hatchling, 
>> editables, pathspec, poetry_core, tomlkit, deprecation; update tomli, 
>> flit_core, setuptools, pip, wheel
>> 9307820a88 Trac #33821: Remove use of SAGE_LIB in sage.misc
>> b23b788586 Trac #33409: Size of docker images has increased in 9.5
>> b5d2fcaeb0 Trac #33029: Feature and doctest tag for runtime cython
>> be2bda4921 Trac #29779: pkgconf: Update to 1.8.0, remove runtime dep on 
>> environment variable SAGE_LOCAL
>> c02edcb15b Trac #25374: Upgrade cryptominisat to 5.8.0, fix build on 
>> Cygwin
>> e22b33a0c1 Trac #34017: Fix tox-docker builds after #29941
>> c4236d0844 Trac #34008: pycodestyle cleanup in 
>> sage.graphs.generic_graph_pyx.pyx
>> 6f961ffa38 Trac #34007: Allow start parameter in Python's sum
>> c59c86cfbd Trac #33996: ascii_art fail in jupyter notebook
>> c40983afcd Trac #33991: remove some unused imports
>> b02c408763 Trac #33978: various details about typing in combinat
>> 6fb1e3f13a Trac #34037: Make doctest from #25626 more robust
>> 4169d7d6c0 Trac #34035: Add __reversed__ method to FrozenBitsets
>> 45c963e0c7 Trac #34030: move supercommutator to superalgebras
>> d4706f96f9 Trac #34019: minor code details in combinat
>> 3d336f0435 Trac #34014: Clean src/sage/graphs/pq_trees.py
>> c9aa34b34c Trac #33957: Manifold.options.omit_function_arguments 
>> ineffective for arguments not in alphabetic order
>> 0b2741d399 Trac #33619: clean up ell_curve_isogeny.py
>> c0e59251e2 Trac #34036: fix the linter
>> 2b36879ae1 Trac #34025: Fix doctest in 
>> sage/modular/overconvergent/hecke_series.py
>> c0abe3f5ee Trac #33213: Replace SAGE_TMP by the system location in the 
>> sage library
>> 7ab174a70d Trac #32340: document behavior of .is_prime() for number fields
>> c69f4af336 Trac #28263: Degree for Affine Morphism or Affine Dynamical 
>> System
>> e516392523 Trac #34001: Add flag to avoid OrePolynomialRing cast to 
>> PolynomialRing
>> 01b8bcb85f Trac #33993: pep cleanup for words/morphism.py
>> 716c5ce262 Trac #33992: remove class inheritance of object in remaining 
>> places
>> de375bce02 Trac #33990: Subset_s _an_element_
>> 0593e83957 Trac #33987: modernize super() in structure, symbolic, 
>> doctest, databases
>> d9a45e29eb Trac #33985: modernize super() in monoids,modules,modular
>> 7ed404657b Trac #33984: modernize super() in schemes,libs,sets,quivers
>> 1df260e842 Trac #33979: .roots() does not always return elements of the 
>> base ring
>> c6c2b85405 Trac #33974: Documentation addition for symmetric functions - 
>> Cauchy identity
>> f92916e358 Trac #33840: bool(matrix) ignores exceptions raised while 
>> comparing entries
>> f8df80820d (tag: 9.7.beta3) Updated SageMath version to 9.7.beta3
>>
>

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