fluidfft installation fails without mpi4py
Created originally on Bitbucket by avmo (Ashwin Vishnu)
see https://bitbucket.org/fluiddyn/fluidfft/addon/pipelines/home#!/results/105
Created originally on Bitbucket by avmo (Ashwin Vishnu)
see https://bitbucket.org/fluiddyn/fluidfft/addon/pipelines/home#!/results/105