title: Installing chatterbot but getting "ERROR: Could not build wheels for spacy which use PEP 517 and cannot be installed directly"
body: <p>I'm trying to install chatterbot on macOS with</p>
  
  <pre><code>python3 -m pip install chatterbot
  </code></pre>
  
  <p>and every time I get the same error during the step "Installing build dependencies ... /"</p>
  
  <pre><code>ERROR: Failed building wheel for spacy
  Running setup.py clean for spacy
  Failed to build spacy
  ERROR: Could not build wheels for spacy which use PEP 517 and cannot be installed directly
  </code></pre>
  
  <p>Can someone please help?</p>
  
  <pre><code>Installing collected packages: spacy, chatterbot
    Running setup.py install for spacy ... error
      ERROR: Complete output from command /Library/Frameworks/Python.framework/Versions/3.7/bin/python3 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-install-33629q9f/spacy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-record-z9jsui8q/install-record.txt --single-version-externally-managed --compile:
      ERROR: running install
      running build
      running build_py
      creating build
      creating build/lib.macosx-10.9-x86_64-3.7
      creating build/lib.macosx-10.9-x86_64-3.7/spacy
      copying spacy/lemmatizer.py -&gt; build/lib.macosx-10.9-x86_64-3.7/spacy
  
  
  running build_ext
      building 'spacy._align' extension
      creating build/temp.macosx-10.9-x86_64-3.7
      creating build/temp.macosx-10.9-x86_64-3.7/spacy
      gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -I/private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-install-33629q9f/spacy/include -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c spacy/_align.cpp -o build/temp.macosx-10.9-x86_64-3.7/spacy/_align.o -O2 -Wno-strict-prototypes -Wno-unused-function -stdlib=libc++
      xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
      error: command 'gcc' failed with exit status 1
      ----------------------------------------
  ERROR: Command "/Library/Frameworks/Python.framework/Versions/3.7/bin/python3 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-install-33629q9f/spacy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-record-z9jsui8q/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/var/folders/ry/sht50z853vn58nwg6wbzt4l00000gn/T/pip-install-33629q9f/spacy/
  </code></pre>