keops: FileNotFoundError: [Errno 2] No such file or directory: '/.cache/pykeops-1.5-cpython-36//KeOps_formula.o

Hi All, I’m trying to get pykeops version 1.5 running. we have CUDA 10.1.240 and gcc, g++ 7.5. However, when I try to install pykeops and run a sample test code on my gpu notebook, i run into the following error

Can you please help here?

!pip install cmake
!pip install pykeops

import numpy as np
import pykeops
pykeops.clean_pykeops()          # just in case old build files are still present
print(pykeops.config.bin_folder)

pykeops.config.verbose = True
from pykeops.numpy import Genred

x = np.arange(1, 10).reshape(-1, 3).astype('float32')
y = np.arange(3, 9 ).reshape(-1, 3).astype('float32')

my_conv = Genred('-SqNorm2(x-y)', ['x = Vi(3)', 'y = Vj(3)'])
print(my_conv(x, y))