cmdstanpy: Compilation errors of model with `cmdstanpy`

Summary:

Please provide a short couple sentence summary. I am trying to install and run a simple model as part of StanCon2019: https://github.com/lauken13/Beginners_Bayes_Workshop/blob/master/stan_programs/simple_poisson_regression.stan

Description:

Describe the issue as clearly as possible. I tried to compile the model:

from pathlib import Path
from cmdstanpy import cmdstan_path, Model, StanFit
model_path = Path('stan_programs/simple_poisson_regression.stan')
m = Model(model_path)

m.compile()

Gives me the following error message

INFO:cmdstanpy:compiling c++
ERROR:cmdstanpy:make cmd failed ERROR
 error: PCH file uses a newer PCH format that cannot be read
1 error generated.
make: *** [/Users/tommylees/github/stancon_2019/Beginners_Bayes_Workshop/stan_programs/simple_poisson_regression] Error 1
ERROR:cmdstanpy:model compilation failed

Additional Information:

Provide any additional information here.

I installed cmdstan using the install_cmdstan option.

I also have a working installation of Stan on my R environment which allows me to compile the model. This might be interfering with the cmdstan installation

Current Version:

In [23]: cmdstanpy.__version__
Out[23]: '0.4.2'