因此，在尝试安装spacy时，Anaconda最终放弃了：
$ conda install -c conda-forge spacy 2.6m < Thu Jul 11 19:38:32 2019
WARNING conda.base.context:use_only_tar_bz2(632): Conda is constrained to only using the old .tar.bz2 file format because you have conda-build installed, and it is <3.18.3. Update or remove conda-build to get smaller downloads and faster extractions.
Collecting package metadata (repodata.json): done
Solving environment: failed
UnsatisfiableError: The following specifications were found to be incompatible with each other:
- anaconda==2019.03=py37_0 -> anaconda-client==1.7.2=py37_0 -> nbformat -> jsonschema[version='>=2.4,!=2.5.0']
- anaconda==2019.03=py37_0 -> importlib_metadata==0.8=py37_0
- anaconda==2019.03=py37_0 -> mkl-service==1.1.2=py37hfbe908c_5
- conda-forge/noarch::nbstripout==0.3.5=py_0 -> nbformat -> jsonschema[version='>=2.4,!=2.5.0']
- jsonschema
- pkgs/main/osx-64::_ipyw_jlab_nb_ext_conf==0.1.0=py37_0 -> ipywidgets -> nbformat[version='>=4.2.0'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::anaconda-client==1.7.2=py37_0 -> nbformat -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::anaconda-navigator==1.9.7=py37_0 -> anaconda-client[version='>=1.6.14'] -> nbformat[version='>=4.4.0'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::importlib_metadata==0.8=py37_0
- pkgs/main/osx-64::ipywidgets==7.4.2=py37_0 -> nbformat[version='>=4.2.0'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::jupyter==1.0.0=py37_7 -> ipywidgets -> nbformat[version='>=4.2.0'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::jupyterlab==0.35.4=py37hf63ae98_0 -> jupyterlab_server[version='>=0.2.0,<0.3.0'] -> notebook -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::jupyterlab_server==0.2.0=py37_0 -> notebook -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::mkl-service==1.1.2=py37hfbe908c_5
- pkgs/main/osx-64::nbconvert==5.4.1=py37_3 -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::nbformat==4.4.0=py37_0 -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::notebook==5.7.8=py37_0 -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::path.py==11.5.0=py37_0 -> importlib_metadata[version='>=0.5']
- pkgs/main/osx-64::spyder==3.3.3=py37_0 -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- pkgs/main/osx-64::widgetsnbextension==3.4.2=py37_0 -> notebook[version='>=4.4.1'] -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.4,!=2.5.0']
- plotly/noarch::plotly==3.9.0=py_0 -> nbformat[version='>=4.2'] -> jsonschema[version='>=2.4,!=2.5.0']
所有列出的软件包似乎都不与spacy发生冲突。现在怎么办？