Problems installing lxml on M1 mac

Question

So, I'm having the classic trouble install lxml.

Initially I was just pip installing, but when I tried to free up memory using Element.clear() I was getting the following error:

Python(58695,0x1001b4580) malloc: *** error for object 0x600000bc3f60: pointer being freed was not allocated

I thought this must be because lxml is using the system's libxml2 which is probably out of date.

So I used homebrew to install libxml2 and libxlt, and I force linked them both.

I then tried to install using the following command:

❯ STATIC_DEPS=true pip install lxml --no-cache-dir                                                13:01:46
Collecting lxml
  Downloading lxml-4.8.0.tar.gz (3.2 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.2/3.2 MB 5.4 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Building wheels for collected packages: lxml
  Building wheel for lxml (setup.py) ... done
  Created wheel for lxml: filename=lxml-4.8.0-cp310-cp310-macosx_12_0_arm64.whl size=1683935 sha256=47912c1ba66d274c3ad7b2a2db00243f96d334a3fd5e439725f5005a7a72a602
  Stored in directory: /private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-ephem-wheel-cache-4_v4ov7s/wheels/e4/52/34/64064e2e2f1ce84d212a6dde6676f3227846210a7996fc2530
Successfully built lxml
Installing collected packages: lxml
Successfully installed lxml-4.8.0

..but then when I tried to import etree I would get this error:

Traceback (most recent call last):
  File "/Users/human/Code/ia_book_images/viewer/book_image_downloader.py", line 4, in <module>
    from lxml import etree as ET
ImportError: dlopen(/Users/human/.virtualenvs/ia_book_images/lib/python3.10/site-packages/lxml/etree.cpython-310-darwin.so, 0x0002): symbol not found in flat namespace '___htmlDefaultSAXHandler'

So then I thought let's make 100% sure that it's using the right versions of libxml2 using CFLAGS and got the following result:

❯ CFLAGS="-I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include" STATIC_DEPS=true pip install lxml --no-cache-dir
Collecting lxml
  Downloading lxml-4.8.0.tar.gz (3.2 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.2/3.2 MB 4.4 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [199 lines of output]
      Checking for gcc...
      Checking for shared library support...
      Building shared library libz.1.2.12.dylib with gcc.
      Checking for size_t... Yes.
      Checking for off64_t... No.
      Checking for fseeko... Yes.
      Checking for strerror... Yes.
      Checking for unistd.h... Yes.
      Checking for stdarg.h... Yes.
      Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf().
      Checking for vsnprintf() in stdio.h... Yes.
      Checking for return value of vsnprintf()... Yes.
      Checking for attribute(visibility) support... Yes.
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -I. -c -o example.o test/example.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o adler32.o adler32.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o crc32.o crc32.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o deflate.o deflate.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o infback.o infback.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o inffast.o inffast.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o inflate.o inflate.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o inftrees.o inftrees.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o trees.o trees.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o zutil.o zutil.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o compress.o compress.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o uncompr.o uncompr.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o gzclose.o gzclose.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o gzlib.o gzlib.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o gzread.o gzread.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN  -c -o gzwrite.o gzwrite.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -I. -c -o minigzip.o test/minigzip.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/adler32.o adler32.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/crc32.o crc32.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/deflate.o deflate.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/infback.o infback.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/inflate.o inflate.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/inffast.o inffast.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/inftrees.o inftrees.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/trees.o trees.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/zutil.o zutil.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/gzclose.o gzclose.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/uncompr.o uncompr.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/compress.o compress.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/gzlib.o gzlib.c
      libtool -o libz.a adler32.o crc32.o deflate.o infback.o inffast.o inflate.o inftrees.o trees.o zutil.o compress.o uncompr.o gzclose.o gzlib.o gzread.o gzwrite.o
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/gzread.o gzread.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN  -DPIC -c -o objs/gzwrite.o gzwrite.c
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -o example example.o -L. libz.a
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -o minigzip minigzip.o -L. libz.a
      gcc -dynamiclib -install_name /private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/build/tmp/libxml2/lib/libz.1.dylib -compatibility_version 1 -current_version 1.2.12 -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -fPIC -DHAVE_HIDDEN -o libz.1.2.12.dylib adler32.lo crc32.lo deflate.lo infback.lo inffast.lo inflate.lo inftrees.lo trees.lo zutil.lo compress.lo uncompr.lo gzclose.lo gzlib.lo gzread.lo gzwrite.lo  -lc -arch x86_64
      ld: warning: ignoring file crc32.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file adler32.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file deflate.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file infback.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file inffast.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file inflate.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file inftrees.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file trees.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file compress.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file zutil.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file uncompr.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file gzread.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file gzlib.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file gzclose.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      ld: warning: ignoring file gzwrite.lo, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
      rm -f libz.dylib libz.1.dylib
      ln -s libz.1.2.12.dylib libz.dylib
      ln -s libz.1.2.12.dylib libz.1.dylib
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -o examplesh example.o -L. libz.1.2.12.dylib
      gcc -I/opt/homebrew/opt/libxslt/include -I/opt/homebrew/opt/libxml2/include -DHAVE_HIDDEN -o minigzipsh minigzip.o -L. libz.1.2.12.dylib
      ld: warning: ignoring file libz.1.2.12.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
      ld: warning: ignoring file libz.1.2.12.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
      Undefined symbols for architecture arm64:
        "_gzclose", referenced from:
            _gz_compress in minigzip.o
            _gz_uncompress in minigzip.o
        "_gzdopen", referenced from:
            _main in minigzip.o
        "_gzerror", referenced from:
            _gz_compress in minigzip.o
            _gz_uncompress in minigzip.o
        "_gzopen", referenced from:
            _file_compress in minigzip.o
            _file_uncompress in minigzip.o
            _main in minigzip.o
        "_gzread", referenced from:
            _gz_uncompress in minigzip.o
        "_gzwrite", referenced from:
            _gz_compress in minigzip.o
      ld: symbol(s) not found for architecture arm64
      Undefined symbols for architecture arm64:
        "_compress", referenced from:
            _test_compress in example.o
           (maybe you meant: _test_compress)
        "_deflate", referenced from:
            _test_deflate in example.o
            _test_large_deflate in example.o
            _test_flush in example.o
            _test_dict_deflate in example.o
           (maybe you meant: _test_large_deflate, _test_deflate , _test_dict_deflate )
        "_deflateEnd", referenced from:
            _test_deflate in example.o
            _test_large_deflate in example.o
            _test_flush in example.o
            _test_dict_deflate in example.o
        "_deflateInit_", referenced from:
            _test_deflate in example.o
            _test_large_deflate in example.o
            _test_flush in example.o
            _test_dict_deflate in example.o
        "_deflateParams", referenced from:
            _test_large_deflate in example.o
        "_deflateSetDictionary", referenced from:
            _test_dict_deflate in example.o
        "_gzclose", referenced from:
            _test_gzio in example.o
        "_gzerror", referenced from:
            _test_gzio in example.o
        "_gzgetc", referenced from:
            _test_gzio in example.o
        "_gzgets", referenced from:
            _test_gzio in example.o
        "_gzopen", referenced from:
            _test_gzio in example.o
        "_gzprintf", referenced from:
            _test_gzio in example.o
        "_gzputc", referenced from:
            _test_gzio in example.o
        "_gzputs", referenced from:
            _test_gzio in example.o
        "_gzread", referenced from:
            _test_gzio in example.o
        "_gzseek", referenced from:
            _test_gzio in example.o
        "_gztell", referenced from:
            _test_gzio in example.o
        "_gzungetc", referenced from:
            _test_gzio in example.o
        "_inflate", referenced from:
            _test_inflate in example.o
            _test_large_inflate in example.o
            _test_sync in example.o
            _test_dict_inflate in example.o
           (maybe you meant: _test_large_inflate, _test_inflate , _test_dict_inflate )
        "_inflateEnd", referenced from:
            _test_inflate in example.o
            _test_large_inflate in example.o
            _test_sync in example.o
            _test_dict_inflate in example.o
        "_inflateInit_", referenced from:
            _test_inflate in example.o
            _test_large_inflate in example.o
            _test_sync in example.o
            _test_dict_inflate in example.o
        "_inflateSetDictionary", referenced from:
            _test_dict_inflate in example.o
        "_inflateSync", referenced from:
            _test_sync in example.o
        "_uncompress", referenced from:
            _test_compress in example.o
        "_zlibCompileFlags", referenced from:
            _main in example.o
        "_zlibVersion", referenced from:
            _main in example.o
      clang: error: linker command failed with exit code 1 (use -v to see invocation)
      ld: symbol(s) not found for architecture arm64
      clang: error: linker command failed with exit code 1 (use -v to see invocation)
      make: *** [minigzipsh] Error 1
      make: *** Waiting for unfinished jobs....
      make: *** [examplesh] Error 1
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/setup.py", line 270, in <module>
          **setup_extra_options()
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/setup.py", line 162, in setup_extra_options
          ext_modules = setupinfo.ext_modules(
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/setupinfo.py", line 74, in ext_modules
          XML2_CONFIG, XSLT_CONFIG = build_libxml2xslt(
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/buildlibxml.py", line 428, in build_libxml2xslt
          cmmi(zlib_configure_cmd, zlib_dir, multicore, **call_setup)
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/buildlibxml.py", line 352, in cmmi
          call_subprocess(
        File "/private/var/folders/g9/lqph46sj36n9kkvjt1pzdxhm0000gn/T/pip-install-kl4hmrrk/lxml_4ecb3c255ad049e39a89a66ee0a50e76/buildlibxml.py", line 335, in call_subprocess
          raise Exception('Command "%s" returned code %s' % (cmd_desc, returncode))
      Exception: Command "make -j6" returned code 2
      Building lxml version 4.8.0.
      Latest version of zlib is 1.2.12
      Downloading zlib into libs/zlib-1.2.12.tar.gz from https://zlib.net/zlib-1.2.12.tar.gz
      Unpacking zlib-1.2.12.tar.gz into build/tmp
      Latest version of libiconv is 1.16
      Downloading libiconv into libs/libiconv-1.16.tar.gz from https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz
      Unpacking libiconv-1.16.tar.gz into build/tmp
      Latest version of libxml2 is 2.9.12
      Downloading libxml2 into libs/libxml2-2.9.12.tar.gz from http://xmlsoft.org/sources/libxml2-2.9.12.tar.gz
      Unpacking libxml2-2.9.12.tar.gz into build/tmp
      Latest version of libxslt is 1.1.34
      Downloading libxslt into libs/libxslt-1.1.34.tar.gz from http://xmlsoft.org/sources/libxslt-1.1.34.tar.gz
      Unpacking libxslt-1.1.34.tar.gz into build/tmp
      Starting build in build/tmp/zlib-1.2.12
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Do I need to do something special to build lxml on an m1 mac?

Lydia

Did you find any workaround for this? – Francois

@vishnukk see my answer below. Turns out the standard pip install was working fine and I was calling clear() somewhere I wasn't allowed to. – Lydia

Follow/vote for Mac ARM wheels to be published to PyPI. – Configuration

Answer 1

It turned out that installing lxml with a simple pip install was working fine.

The reason for my malloc error was the fact that I was trying to clear the element before the end tag had been seen. Turns out this isn't possible and you need to wait for the end tag even if you already know you aren't interested in the element.

Lydia

I am having an issue with beautiful soup and lxml parser. I have the following lambda function df[col].apply(lambda x: BeautifulSoup(x, "lxml").get_text().strip()). I can install lxml with no problem using pip, however when I run the above code I get the following error: "Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?". I am running this on an M1 MacBook Air. This same link of code works fine on google collab. I appreciate any suggestion. – Sophia

You may also find that you need to install cython -- for me, it was pip3 install cython ... then the build (above, but newer version) worked fine. – Leery

Answer 2

I was facing the same issue. After installation of lxml by running the command python -c 'from lxml import etree', I got this error:

  File "<string>", line 1, in <module>
ImportError: dlopen(/venv/lib/python3.9/site-packages/lxml/etree.cpython-39-darwin.so, 2): no suitable image found.  Did find:
        /venv/lib/python3.9/site-packages/lxml/etree.cpython-39-darwin.so: mach-o, but wrong architecture
        /venv/lib/python3.9/site-packages/lxml/etree.cpython-39-darwin.so: mach-o, but wrong architecture

Used below command to fix the issue:

ARCHFLAGS="-arch arm64" pip install lxml

Florez

Answer 3

One solution that works - build it from source:

git clone https://github.com/lxml/lxml
cd lxml
git checkout tags/lxml-4.9.1
python3 setup.py bdist_wheel
cd dist/
sudo pip3 install lxml-4.9.1-cp310-cp310-macosx_12_0_arm64.whl

For additional resources: https://lxml.de/installation.html

Orest

Since the Cython-generated .c files are not in the repo but only distributed with lxml releases, I had to curl -L https://github.com/lxml/lxml/releases/download/lxml-4.9.1/lxml-4.9.1.tar.gz -o lxml-4.9.1.tar.gz && tar xzf lxml-4.9.1.tar.gz instead of using git clone/checkout. Otherwise you will get build error – Vadim

Shouldn't pip install lxml build from source by default when it doesn't find a binary wheel? So unless you are using x86 Python (instead of the native ARM64), this should work out of the box. – Unpaidfor

Answer 4

This still isn't working on Macs with Apple Silicon (M1 chip). I've tried building from source but that fails:

ImportError: dlopen(~/.local/share/virtualenvs/onixjester-C0VQWNFj/lib/python3.9/site-packages/lxml/etree.cpython-39-darwin.so, 0x0002): symbol not found in flat namespace '_exsltDateXpathCtxtRegister

, and if I install with Michael M's suggested ARCHFLAGS with pip, it still complains with the above message when I try:

python -c "from lxml import etree"

I'm wondering if this problem is with etree or with cpython?

Leery

Did you find any solution? I'm hitting this error right now. – Nickel

Michael M's solution "ARCHFLAGS="-arch arm64" pip3 install lxml" now seems to work for me. I'm now running Python 3.11.5. I didn't do an exhaustive test, but I can import etree now and create a root node which was causing errors before. – Leery

Answer 5

not sure if this is same situation for you, but i couldn't install lxml within a virtualenv, but i could install successfully to the system python pip3 install lxml; then when i went back to the virtualenv and did pip install lxml, it pulled from the same cache that lxml had successfully been installed through and installed into the virtualenv

Fechner

Answer 6

Build from source as oxuser suggest was the solution to me, just check the Python architecture you are running under to finally have what you want: an osx-64 or osx-arm64 (M1 native) wheel. The easier way to control this, from my point of view, is to use Conda from Anaconda (install it from here) and, if you haven't yet, install Cython.

1. To check your Python architecture type in terminal:

   python -c 'import platform; print(platform.platform())'

2. Add this lines tu your ~/.zshrc or equivalent (from this article):

   create_x86_conda_environment () { CONDA_SUBDIR=osx-64 conda create -n $@ conda activate $1 } create_ARM_conda_environment () { CONDA_SUBDIR=osx-arm64 conda create -n $@ conda activate $1 }

3. Restart your shell

4. In the terminal set you environment, ej:

create_ARM_conda_environment myenv_xARM python=3.9

Or

create_x86_conda_environment myenv_x86 python=3.9

5. Follow the 6 instructions building guide from oxuser keeping in mind that in the 6th step the file name (lxml-4.9.1-cp310-cp310-macosx_12_0_arm64.whl) can be different in your case depending of the environment chosen.

Muscadine