On 26 Sep 2018, at 18:02, Cotter, Colin J <colin.cotter@imperial.ac.uk> wrote:

 Sorry, we should put some more detailed installation instructions on the Gusto website. This is an extra dependency of Gusto but not of Firedrake.

You need to type

pip install netCDF4


Something is broken here because gusto specifies netCDF4 inits requirements.txt and firedrake-install is meant to obey that. 

Lawrence