Probably the thing to try would be:

make distclean

and then you can build from scratch via:

./bootstrap
source .homebrew-build-env
./configure
make -j4 build

But if you want to try cleaning wheel first before starting from scratch, 
you could just try

make wheel-clean
make -j4 build

but it might be better to clean everything and start from scratch.

On Monday, February 8, 2021 at 10:59:05 AM UTC-5 Trevor Karn wrote:

> I do not see pep425tags.py in that directory. 
>
> trevorkarn@Trevors-MacBook-Air sage % cd 
> /Users/trevorkarn/Applications/sage/local/lib/python3.9/site-packages/wheel/
>
> trevorkarn@Trevors-MacBook-Air wheel % ls
>
> __init__.py __pycache__ cli metadata.py util.py wheelfile.py
>
> __main__.py bdist_wheel.py macosx_libfile.py pkginfo.py vendored
>
> Is there a way to clean the build environment?
>
> Best Regards,
>
> Trevor Karn
>
>
> On Mon, Feb 8, 2021 at 9:54 AM Dima Pasechnik <[email protected]> wrote:
>
>> the only explanation for pep425tags.py would be an unclean build
>> environment - e.g. weird env vars set, or strange stuff in PATH.
>>
>> On Mon, Feb 8, 2021 at 3:51 PM Zachary Scherr <[email protected]> wrote:
>> >
>> > and do you see that pep425tags.py file in that directory?
>> >
>> > On Monday, February 8, 2021 at 10:21:09 AM UTC-5 Trevor Karn wrote:
>> >>
>> >> The only contents of the file you pointed me towards are
>> >>
>> >> __version__ = '0.36.2'
>> >>
>> >> Best Regards,
>> >>
>> >> Trevor Karn
>> >>
>> >>
>> >> On Mon, Feb 8, 2021 at 9:09 AM Zachary Scherr <[email protected]> 
>> wrote:
>> >>>
>> >>> I really don't understand.  The Cython log file shows that the 
>> problem is in
>> >>>
>> >>> 
>> /Users/trevorkarn/Applications/sage/local/lib/python3.9/site-packages/wheel/pep425tags.py
>> >>>
>> >>> I could be mistaken, but I don't think pep425tags.py has been a part 
>> of the wheel package for a while now.  Certainly when I looked at wheel on 
>> my sage there was no such file.
>> >>>
>> >>> Can you go to your 
>> "/Users/trevorkarn/Applications/sage/local/lib/python3.9/site-packages/wheel/"
>>  
>> directory and take a look at __init__.py.  Does the version say 0.36.2?
>> >>>
>> >>> On Monday, February 8, 2021 at 9:32:20 AM UTC-5 Trevor Karn wrote:
>> >>>>
>> >>>>
>> >>>> Here is what I get. It seems like it is the same as yours?
>> >>>>
>> >>>>
>> >>>> trevorkarn@Trevors-MacBook-Air sage % brew info python3
>> >>>>
>> >>>> [email protected]: stable 3.9.1
>> >>>>
>> >>>> Interpreted, interactive, object-oriented programming language
>> >>>>
>> >>>> https://www.python.org/
>> >>>>
>> >>>> /usr/local/Cellar/[email protected]/3.9.1_8 (8,665 files, 129.4MB) *
>> >>>>
>> >>>>   Built from source on 2021-02-05 at 16:39:31
>> >>>>
>> >>>> From: 
>> https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/[email protected]
>> >>>>
>> >>>> License: Python-2.0
>> >>>>
>> >>>> ==> Dependencies
>> >>>>
>> >>>> Build: pkg-config ✔
>> >>>>
>> >>>> Required: gdbm ✔, [email protected] ✔, readline ✔, sqlite ✔, tcl-tk ✔, xz ✔
>> >>>>
>> >>>> ==> Caveats
>> >>>>
>> >>>> Python has been installed as
>> >>>>
>> >>>>   /usr/local/bin/python3
>> >>>>
>> >>>>
>> >>>> Unversioned symlinks `python`, `python-config`, `pip` etc. pointing 
>> to
>> >>>>
>> >>>> `python3`, `python3-config`, `pip3` etc., respectively, have been 
>> installed into
>> >>>>
>> >>>>   /usr/local/opt/[email protected]/libexec/bin
>> >>>>
>> >>>>
>> >>>> You can install Python packages with
>> >>>>
>> >>>>   pip3 install <package>
>> >>>>
>> >>>> They will install into the site-package directory
>> >>>>
>> >>>>   /usr/local/lib/python3.9/site-packages
>> >>>>
>> >>>>
>> >>>> See: https://docs.brew.sh/Homebrew-and-Python
>> >>>>
>> >>>> ==> Analytics
>> >>>>
>> >>>> install: 755,419 (30 days), 2,396,024 (90 days), 2,995,387 (365 days)
>> >>>>
>> >>>> install-on-request: 244,063 (30 days), 714,665 (90 days), 799,812 
>> (365 days)
>> >>>>
>> >>>> build-error: 0 (30 days)
>> >>>>
>> >>>>
>> >>>> Best Regards,
>> >>>>
>> >>>> Trevor Karn
>> >>>>
>> >>>>
>> >>>> On Mon, Feb 8, 2021 at 8:17 AM Dima Pasechnik <[email protected]> 
>> wrote:
>> >>>>>
>> >>>>> Could it be that you need to update your Homebrew (?) python3 
>> package?
>> >>>>> What version do you have now?
>> >>>>> E.g. on a box where the latest Sage builds I have
>> >>>>>
>> >>>>> % brew info python3
>> >>>>>
>> >>>>> [email protected]: stable 3.9.1 (bottled)
>> >>>>> Interpreted, interactive, object-oriented programming language
>> >>>>> https://www.python.org/
>> >>>>> /usr/local/Cellar/[email protected]/3.9.1_8 (4,057 files, 67.8MB) *
>> >>>>>   Poured from bottle on 2021-02-06 at 10:13:24
>> >>>>> From: 
>> https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/[email protected]
>> >>>>>
>> >>>>>
>> >>>>> On Mon, Feb 8, 2021 at 1:53 PM Trevor Karn <[email protected]> 
>> wrote:
>> >>>>> >
>> >>>>> > Ah I see, thanks for explaining.
>> >>>>> >
>> >>>>> > Here is my top-level config.log.
>> >>>>> >
>> >>>>> > Best Regards,
>> >>>>> >
>> >>>>> > Trevor Karn
>> >>>>> >
>> >>>>> >
>> >>>>> > On Mon, Feb 8, 2021 at 7:09 AM Dima Pasechnik <[email protected]> 
>> wrote:
>> >>>>> >>
>> >>>>> >>
>> >>>>> >>
>> >>>>> >> On Mon, 8 Feb 2021, 13:02 Trevor Karn, <[email protected]> 
>> wrote:
>> >>>>> >>>
>> >>>>> >>> Thanks for sending that link. I am confused though, because it 
>> says a fix was issued. Does that mean it should work now?
>> >>>>> >>
>> >>>>> >>
>> >>>>> >> sorry, I was not clear. What I meant to say that it appears to 
>> be a well-known issue in the Python@macOS universe,
>> >>>>> >> and lately all seems to be OK with Sage.
>> >>>>> >>
>> >>>>> >> To figure out exactly goes wrong in your case, we need to know 
>> where Python3 used in Sage is coming from.
>> >>>>> >> Please post the top-level config.log
>> >>>>> >>
>> >>>>> >>
>> >>>>> >>>
>> >>>>> >>> And yes, I am on the most recent develop branch
>> >>>>> >>>
>> >>>>> >>> On Mon, Feb 8, 2021 at 5:42 AM Dima Pasechnik <[email protected]> 
>> wrote:
>> >>>>> >>>>
>> >>>>> >>>> This seems to be well-known issue, see e.g
>> >>>>> >>>> https://github.com/pypa/virtualenv/issues/2027
>> >>>>> >>>>
>> >>>>> >>>> Are you on the most recent develop branch (9.3.beta7)?
>> >>>>> >>>>
>> >>>>> >>>> On Mon, Feb 8, 2021 at 9:20 AM Trevor Karn <
>> [email protected]> wrote:
>> >>>>> >>>> >
>> >>>>> >>>> > Hi,
>> >>>>> >>>> >
>> >>>>> >>>> > I'm trying to build Sage from the source code. I cloned it 
>> from git, and tried to build from the develop branch using make from the 
>> sage directory. I ran into trouble building cython. The error message 
>> suggested that I email this group. Does anyone have any advice on how to 
>> proceed?
>> >>>>> >>>> >
>> >>>>> >>>> > I am using macOS Big Sur 11.2 on a MacBook Air.
>> >>>>> >>>> >
>> >>>>> >>>> > The log file is attached, this is from a second run - it 
>> failed once, and I tried running make a second time without any changes and 
>> this is the log from the second run, which returns the same error just 
>> without all of the info before it (eg. the flint installation).
>> >>>>> >>>> >
>> >>>>> >>>> > Thanks so much.
>> >>>>> >>>> >
>> >>>>> >>>> > Best,
>> >>>>> >>>> > Trevor
>> >>>>> >>>> >
>> >>>>> >>>> > --
>> >>>>> >>>> > You received this message because you are subscribed to the 
>> Google Groups "sage-devel" group.
>> >>>>> >>>> > To unsubscribe from this group and stop receiving emails 
>> from it, send an email to [email protected].
>> >>>>> >>>> > To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/1c93ec2e-86bd-45f0-bba0-cc254a392305n%40googlegroups.com
>> .
>> >>>>> >>>>
>> >>>>> >>>> --
>> >>>>> >>>> You received this message because you are subscribed to a 
>> topic in the Google Groups "sage-devel" group.
>> >>>>> >>>> To unsubscribe from this topic, visit 
>> https://groups.google.com/d/topic/sage-devel/TmbLnmwz2mg/unsubscribe.
>> >>>>> >>>> To unsubscribe from this group and all its topics, send an 
>> email to [email protected].
>> >>>>> >>>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAAWYfq3CFFAYzUtNnSrt_RPKW7X_p8j_VXGtZbKLWG%2BST%3DCO%2BQ%40mail.gmail.com
>> .
>> >>>>> >>>
>> >>>>> >>> --
>> >>>>> >>> Best,
>> >>>>> >>>
>> >>>>> >>> Trevor
>> >>>>> >>>
>> >>>>> >>> --
>> >>>>> >>> You received this message because you are subscribed to the 
>> Google Groups "sage-devel" group.
>> >>>>> >>> To unsubscribe from this group and stop receiving emails from 
>> it, send an email to [email protected].
>> >>>>> >>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAJ6VCMAVGG57CHovd7zoXa0C3Nxsr3WfXi0FWwapKrDfup7_sA%40mail.gmail.com
>> .
>> >>>>> >>
>> >>>>> >> --
>> >>>>> >> You received this message because you are subscribed to a topic 
>> in the Google Groups "sage-devel" group.
>> >>>>> >> To unsubscribe from this topic, visit 
>> https://groups.google.com/d/topic/sage-devel/TmbLnmwz2mg/unsubscribe.
>> >>>>> >> To unsubscribe from this group and all its topics, send an email 
>> to [email protected].
>> >>>>> >> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAAWYfq026cNP9FTmBySPskZZoc%2BH4ykTQO7je6TW4YTkirg_qw%40mail.gmail.com
>> .
>> >>>>> >
>> >>>>> > --
>> >>>>> > You received this message because you are subscribed to the 
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>> >>>>> > To unsubscribe from this group and stop receiving emails from it, 
>> send an email to [email protected].
>> >>>>> > To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAJ6VCMDJEN7KzDmvB0x0GDrXiQrK3F_e_eBZvSJf-JxVre0n-Q%40mail.gmail.com
>> .
>> >>>>>
>> >>>>> --
>> >>>>> You received this message because you are subscribed to a topic in 
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>> >>>>> To unsubscribe from this topic, visit 
>> https://groups.google.com/d/topic/sage-devel/TmbLnmwz2mg/unsubscribe.
>> >>>>> To unsubscribe from this group and all its topics, send an email to 
>> [email protected].
>> >>>>>
>> >>>>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAAWYfq3meWN5AWip9BG5GzJ%3DFfLvoHKFrpS6Ezmq4X2GWH8mQw%40mail.gmail.com
>> .
>> >>>
>> >>> --
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>> https://groups.google.com/d/topic/sage-devel/TmbLnmwz2mg/unsubscribe.
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>> >>>
>> >>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/c02796d9-9057-41e2-829f-eeb933132d42n%40googlegroups.com
>> .
>> >
>> > --
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>> > To unsubscribe from this group and stop receiving emails from it, send 
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>> > To view this discussion on the web visit 
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>> .
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> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-devel/CAAWYfq08zf6vp0LfT%2BGfAy25ML95cxTyxAQho9gB_UdGjqpHFA%40mail.gmail.com
>> .
>>
>

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