Zlib dependency issue

[jrmcmah2]

I am using the following command to install Pillow on my local windows 10 machine using Python 3.9:

python3 -m pip install --upgrade Pillow --no-binary :all:

When I do this I am receiving an error that the zlib files cannot be found:

I do have Zlib installed at: C:\Program Files (x86)\Zlib

I have been looking at the installation page for guidance but cannot find where the wheel for Pillow expects the Zlib files to be. Can someone provide guidance here?

[radarhere]

Using a wheel shouldn't mean that you need to have zlib installed. It should be either that you are using a wheel, or that you need zlib installed, not both.

Could you provide the full output of the pip command?

[jrmcmah2]

So I first ran "python -m pip install --upgrade pip" and that ran just fine. Then I ran "python -m pip install --upgrade Pillow --no-binary :all:"

The output of that second command was as follows:
Collecting Pillow
Using cached Pillow-10.0.0.tar.gz (50.5 MB)
Installing build dependencies: started
Installing build dependencies: finished with status 'done'
Getting requirements to build wheel: started
Getting requirements to build wheel: finished with status 'done'
Preparing metadata (pyproject.toml): started
Preparing metadata (pyproject.toml): finished with status 'done'
Building wheels for collected packages: Pillow
Building wheel for Pillow (pyproject.toml): started
Building wheel for Pillow (pyproject.toml): finished with status 'error'
Failed to build Pillow

error: subprocess-exited-with-error

Building wheel for Pillow (pyproject.toml) did not run successfully.
exit code: 1

[201 lines of output]
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win32-cpython-39
creating build\lib.win32-cpython-39\PIL
copying src\PIL\BdfFontFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\BlpImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\BmpImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\BufrStubImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ContainerIO.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\CurImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\DcxImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\DdsImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\EpsImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ExifTags.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\features.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\FitsImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\FliImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\FontFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\FpxImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\FtexImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GbrImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GdImageFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GifImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GimpGradientFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GimpPaletteFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\GribStubImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\Hdf5StubImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\IcnsImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\IcoImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\Image.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageChops.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageCms.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageColor.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageDraw.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageDraw2.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageEnhance.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageFilter.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageFont.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageGrab.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageMath.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageMode.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageMorph.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageOps.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImagePalette.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImagePath.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageQt.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageSequence.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageShow.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageStat.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageTk.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageTransform.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImageWin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\ImtImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\IptcImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\Jpeg2KImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\JpegImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\JpegPresets.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\McIdasImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\MicImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\MpegImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\MpoImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\MspImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PaletteFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PalmImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PcdImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PcfFontFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PcxImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PdfImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PdfParser.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PixarImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PngImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PpmImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PsdImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PSDraw.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\PyAccess.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\QoiImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\SgiImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\SpiderImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\SunImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\TarIO.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\TgaImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\TiffImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\TiffTags.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\WalImageFile.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\WebPImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\WmfImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\XbmImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\XpmImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL\XVThumbImagePlugin.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_binary.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_deprecate.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_tkinter_finder.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_util.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_version.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_init_.py -> build\lib.win32-cpython-39\PIL
copying src\PIL_main_.py -> build\lib.win32-cpython-39\PIL
running egg_info
writing src\Pillow.egg-info\PKG-INFO
writing dependency_links to src\Pillow.egg-info\dependency_links.txt
writing requirements to src\Pillow.egg-info\requires.txt
writing top-level names to src\Pillow.egg-info\top_level.txt
reading manifest file 'src\Pillow.egg-info\SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching '.c'
warning: no files found matching '.h'
warning: no files found matching '.sh'
warning: no files found matching '.txt'
warning: no previously-included files found matching '.appveyor.yml'
warning: no previously-included files found matching '.clang-format'
warning: no previously-included files found matching '.coveragerc'
warning: no previously-included files found matching '.editorconfig'
warning: no previously-included files found matching '.readthedocs.yml'
warning: no previously-included files found matching 'codecov.yml'
warning: no previously-included files found matching 'renovate.json'
warning: no previously-included files matching '.git*' found anywhere in distribution
warning: no previously-included files matching '.pyc' found anywhere in distribution
warning: no previously-included files matching '.so' found anywhere in distribution
no previously-included directories found matching '.ci'
adding license file 'LICENSE'
writing manifest file 'src\Pillow.egg-info\SOURCES.txt'
warning: build_py: byte-compiling is disabled, skipping.

running build_ext

The headers or library files could not be found for zlib,
a required dependency when compiling Pillow from source.

Please see the install instructions at:
https://pillow.readthedocs.io/en/latest/installation.html

Traceback (most recent call last):
File "", line 988, in
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_init_.py", line 107, in setup
return distutils.core.setup(**attrs)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\core.py", line 185, in setup
return run_commands(dist)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\core.py", line 201, in run_commands
dist.run_commands()
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\dist.py", line 969, in run_commands
self.run_command(cmd)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\dist.py", line 1234, in run_command
super().run_command(command)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\dist.py", line 988, in run_command
cmd_obj.run()
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\wheel\bdist_wheel.py", line 343, in run
self.run_command("build")
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\cmd.py", line 318, in run_command
self.distribution.run_command(command)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\dist.py", line 1234, in run_command
super().run_command(command)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\dist.py", line 988, in run_command
cmd_obj.run()
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\command\build.py", line 131, in run
self.run_command(cmd_name)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\cmd.py", line 318, in run_command
self.distribution.run_command(command)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\dist.py", line 1234, in run_command
super().run_command(command)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\dist.py", line 988, in run_command
cmd_obj.run()
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\command\build_ext.py", line 84, in run
_build_ext.run(self)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools_distutils\command\build_ext.py", line 345, in run
self.build_extensions()
File "", line 811, in build_extensions
main.RequiredDependencyException: zlib

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\jimmy\Desktop\Projects\Runescape\venv\lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 353, in
main()
File "C:\Users\jimmy\Desktop\Projects\Runescape\venv\lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 335, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
File "C:\Users\jimmy\Desktop\Projects\Runescape\venv\lib\site-packages\pip_vendor\pyproject_hooks_in_process_in_process.py", line 251, in build_wheel
return _build_backend().build_wheel(wheel_directory, config_settings,
File "C:\Users\jimmy\AppData\Local\Temp\pip-install-1q6cwqnm\pillow_be6620f1fc8b48dea5bd97c092b1c0b2_custom_build\backend.py", line 53, in build_wheel
return super().build_wheel(wheel_directory, config_settings, metadata_directory)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\build_meta.py", line 416, in build_wheel
return self._build_with_temp_dir(['bdist_wheel'], '.whl',
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\build_meta.py", line 401, in _build_with_temp_dir
self.run_setup()
File "C:\Users\jimmy\AppData\Local\Temp\pip-install-1q6cwqnm\pillow_be6620f1fc8b48dea5bd97c092b1c0b2_custom_build\backend.py", line 47, in run_setup
return super().run_setup(setup_script)
File "C:\Users\jimmy\AppData\Local\Temp\pip-build-env-wwiwcrx4\overlay\Lib\site-packages\setuptools\build_meta.py", line 338, in run_setup
exec(code, locals())
File "", line 1005, in
main.RequiredDependencyException:

The headers or library files could not be found for zlib,
a required dependency when compiling Pillow from source.

Please see the install instructions at:
https://pillow.readthedocs.io/en/latest/installation.html

[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for Pillow
ERROR: Could not build wheels for Pillow, which is required to install pyproject.toml-based projects

[jrmcmah2]

Is there a different command that I should run here to be able to disregard the zlib dependencies? I try to install it through pycharm as well and the output still ends with issues regarding the zlib dependency.

[aclark4life]

You cannot disregard zlib dependencies when compiling, and compiling is attempted when no wheels are available for your architecture …

[jrmcmah2]

Got it, @aclark4life. Do I need to install something or run some other pip command to obtain the proper wheels? In the installation docs it says I need both Zlib and libjpeg. I have installed (Or at least thought I have installed) both of them.

[aclark4life]

Installation via compilation requires zlib, jpeg, etc. When compilation succeeds, the results are used to create a wheel. Ideally there's already a wheel for your architecture and you don't need to compile.

[homm]

Program Files (x86) is a 32-bit, right? What is your Python 3.9 architecture?

[jrmcmah2]

Sorry can you clarify what you mean by Python3.9 Architecture?

[aclark4life]

Where is your Python 3.9 installed?

[jrmcmah2]

C:\Users\UserName\AppData\Local\Programs\Python\Python39-32

[nulano]

AFAIK dependencies aren't detected automatically on Windows, you have to add them to the INCLIB envvar before attempting to compile Pillow from source. A script that compiles all dependencies and sets the required envvars is provided in the https://github.com/python-pillow/Pillow/tree/main/winbuild directory.