Fastai v1 install issues thread

I’m trying to install pillow-simd for faster JPEG decoding (as explained here) with the following commands:

conda uninstall --force jpeg libtiff -y
conda install -c conda-forge libjpeg-turbo
CC="cc -mavx2" pip install --no-cache-dir -U --force-reinstall --no-binary :all: --compile pillow-simd

The last command fails with the following output:

console output
Collecting package metadata: done
Solving environment: \ 
The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

  - defaults/linux-64::qt==5.6.3=h8bf5577_3
  - conda-forge/noarch::jupyter==1.0.0=py_1
  - defaults/linux-64::scikit-image==0.14.1=py37he6710b0_0
  - defaults/linux-64::pyqt==5.6.0=py37h22d08a2_6
  - defaults/linux-64::imageio==2.4.1=py37_0
  - defaults/linux-64::matplotlib==2.2.2=py37hb69df0a_2
  - defaults/noarch::dask==1.1.1=py_0
  - defaults/linux-64::bokeh==1.0.4=py37_0
  - fastai/noarch::fastai==1.0.52=1
  - defaults/linux-64::pillow==6.0.0=py37h34e0f95_0
  - pytorch/noarch::torchvision==0.2.2=py_3
  - conda-forge/noarch::seaborn==0.9.0=py_0
  - defaults/linux-64::qtconsole==4.4.3=py37_0
  - defaults/linux-64::bcolz==1.2.1=py37h04863e7_0
done

# All requested packages already installed.

(fastai) andreas@max-ubuntu:/media/andreas/Data/Machine Learning$ CC="cc -mavx2" pip install --no-cache-dir -U --force-reinstall --no-binary :all: --compile pillow-simd
Collecting pillow-simd
  Downloading https://files.pythonhosted.org/packages/c1/14/7503657df68b428cb38e1f2cb5f8f086b53e9b6f4b79546596d1fcc30256/Pillow-SIMD-5.3.0.post1.tar.gz (606kB)
    100% |████████████████████████████████| 614kB 19.0MB/s 
Installing collected packages: pillow-simd
  Running setup.py install for pillow-simd ... error
    Complete output from command /home/andreas/anaconda3/envs/fastai/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-rhe5mrpv/pillow-simd/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-gbaqr2pi/install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    running build_py
    creating build
    creating build/lib.linux-x86_64-3.7
    creating build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PcdImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/TarIO.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PdfParser.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/_tkinter_finder.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ContainerIO.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PSDraw.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/_binary.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/MpoImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/XpmImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/Image.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PcfFontFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/WmfImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageShow.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/Hdf5StubImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/IcoImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PdfImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GimpGradientFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageMorph.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/OleFileIO.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/SgiImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PixarImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/JpegImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/_version.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/McIdasImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PpmImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/EpsImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/FitsStubImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/_util.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageGrab.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/XbmImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/TgaImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/IcnsImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/WebPImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageQt.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/FpxImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageDraw.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageCms.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageWin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GifImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageSequence.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/IptcImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/BdfFontFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GdImageFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GribStubImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageColor.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/BufrStubImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/DcxImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageEnhance.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImagePath.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageChops.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/XVThumbImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PyAccess.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/Jpeg2KImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PaletteFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/CurImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/FontFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/features.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/WalImageFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PngImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/DdsImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/TiffImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageFont.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/BlpImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GimpPaletteFile.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/MpegImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/SpiderImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/FtexImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/MicImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PcxImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageFilter.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/FliImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageStat.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/__init__.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageTk.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageMode.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/MspImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageDraw2.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageOps.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImagePalette.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/BmpImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PalmImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/PsdImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageTransform.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImageMath.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ImtImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/SunImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/TiffTags.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/ExifTags.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/JpegPresets.py -> build/lib.linux-x86_64-3.7/PIL
    copying src/PIL/GbrImagePlugin.py -> build/lib.linux-x86_64-3.7/PIL
    running egg_info
    writing src/Pillow_SIMD.egg-info/PKG-INFO
    writing dependency_links to src/Pillow_SIMD.egg-info/dependency_links.txt
    writing top-level names to src/Pillow_SIMD.egg-info/top_level.txt
    reading manifest file 'src/Pillow_SIMD.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 directories found matching 'Tests'
    no previously-included directories found matching 'docs/_static'
    no previously-included directories found matching 'Tests'
    warning: no previously-included files found matching '.appveyor.yml'
    warning: no previously-included files found matching '.coveragerc'
    warning: no previously-included files found matching '.codecov.yml'
    warning: no previously-included files found matching '.editorconfig'
    warning: no previously-included files found matching '.landscape.yaml'
    warning: no previously-included files found matching '.travis'
    warning: no previously-included files found matching '.travis/*'
    warning: no previously-included files found matching 'tox.ini'
    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
    writing manifest file 'src/Pillow_SIMD.egg-info/SOURCES.txt'
    copying src/PIL/.DS_Store -> build/lib.linux-x86_64-3.7/PIL
    running build_ext
    
    
    The headers or library files could not be found for jpeg,
    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 "/tmp/pip-install-rhe5mrpv/pillow-simd/setup.py", line 803, in <module>
        zip_safe=not (debug_build() or PLATFORM_MINGW), )
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/site-packages/setuptools/__init__.py", line 145, in setup
        return distutils.core.setup(**attrs)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/core.py", line 148, in setup
        dist.run_commands()
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/dist.py", line 966, in run_commands
        self.run_command(cmd)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/dist.py", line 985, in run_command
        cmd_obj.run()
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/site-packages/setuptools/command/install.py", line 61, in run
        return orig.install.run(self)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/command/install.py", line 545, in run
        self.run_command('build')
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/cmd.py", line 313, in run_command
        self.distribution.run_command(command)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/dist.py", line 985, in run_command
        cmd_obj.run()
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/command/build.py", line 135, in run
        self.run_command(cmd_name)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/cmd.py", line 313, in run_command
        self.distribution.run_command(command)
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/dist.py", line 985, in run_command
        cmd_obj.run()
      File "/home/andreas/anaconda3/envs/fastai/lib/python3.7/distutils/command/build_ext.py", line 339, in run
        self.build_extensions()
      File "/tmp/pip-install-rhe5mrpv/pillow-simd/setup.py", line 589, in build_extensions
        raise RequiredDependencyException(f)
    __main__.RequiredDependencyException: jpeg
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-rhe5mrpv/pillow-simd/setup.py", line 815, in <module>
        raise RequiredDependencyException(msg)
    __main__.RequiredDependencyException:
    
    The headers or library files could not be found for jpeg,
    a required dependency when compiling Pillow from source.
    
    Please see the install instructions at:
       https://pillow.readthedocs.io/en/latest/installation.html
    
    
    
    ----------------------------------------
Command "/home/andreas/anaconda3/envs/fastai/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-rhe5mrpv/pillow-simd/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-gbaqr2pi/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-install-rhe5mrpv/pillow-simd/

This worked the last time I updated fastai, but it failed today. Any help would be greatly appreciated.