Cupyがインストールエラー

pip install cupy
でインストールすると次のエラーが起きます。
何かわかる方いましたら教えてください。
OSはmacOS Catalinaです。

ERROR: Command errored out with exit status 1:
 command: /Users/idaryuunosuke/.pyenv/versions/anaconda3-5.3.1/envs/py35/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/setup.py'"'"'; __file__='"'"'/private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/pip-egg-info
     cwd: /private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/
Complete output (43 lines):
Options: {'linetrace': False, 'package_name': 'cupy', 'long_description': None, 'wheel_libs': [], 'annotate': False, 'no_rpath': False, 'no_cuda': False, 'wheel_includes': [], 'profile': False}

-------- Configuring Module: cuda --------
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
command '/usr/bin/clang' failed with exit status 1

************************************************************
* CuPy Configuration Summary                               *
************************************************************

Build Environment:
  Include directories: []
  Library directories: []
  nvcc command       : (not found)

Environment Variables:
  CFLAGS          : (none)
  LDFLAGS         : (none)
  LIBRARY_PATH    : (none)
  CUDA_PATH       : (none)
  NVTOOLSEXT_PATH : (none)
  NVCC            : (none)

Modules:
  cuda      : No
    -> Include files not found: ['cublas_v2.h', 'cuda.h', 'cuda_profiler_api.h', 'cuda_runtime.h', 'cufft.h', 'curand.h', 'cusparse.h', 'nvrtc.h']
    -> Check your CFLAGS environment variable.

ERROR: CUDA could not be found on your system.
Please refer to the Installation Guide for details:
https://docs-cupy.chainer.org/en/stable/install.html

************************************************************

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/setup.py", line 132, in <module>
    ext_modules = cupy_setup_build.get_ext_modules()
  File "/private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/cupy_setup_build.py", line 632, in get_ext_modules
    extensions = make_extensions(arg_options, compiler, use_cython)
  File "/private/var/folders/xb/_ns_5kmn24sf094m6kk68c640000gn/T/pip-install-kjovfj57/cupy/cupy_setup_build.py", line 387, in make_extensions
    raise Exception('Your CUDA environment is invalid. '
Exception: Your CUDA environment is invalid. Please check above error log.
----------------------------------------