Thanks for the response. I’ve been using a conda environment – though I did forget to previously uninstall the version I was already working with. Uninstalling them and cleaning made something of a difference, but it’s still failing:
[226/3254] Building CXX object third_party/protobuf/cmake/CMa.../__/src/google/protobuf/compiler/python/python_generator.cc.o
ninja: build stopped: subcommand failed.
Traceback (most recent call last):
  File "setup.py", line 734, in <module>
    build_deps()
  File "setup.py", line 281, in build_deps
    build_dir='build')
  File "/Users/askates/Documents/GitRepos/pytorch/tools/build_pytorch_libs.py", line 248, in build_caffe2
    check_call(ninja_cmd, cwd=build_dir, env=my_env)
  File "/Users/askates/anaconda3/envs/pytorch-1.0/lib/python3.6/subprocess.py", line 291, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['ninja', 'install']' returned non-zero exit status 1.