remove apt-get of nvidia toolkit (which installs nvcc-7.5)
remove apt-get of nvidia toolkit (which installs nvcc-7.5)

xzturn/caffe2,pietern/caffe2,pietern/caffe2,Yangqing/caffe2,sf-wind/caffe2,pietern/caffe2,Yangqing/caffe2,bwasti/caffe2,xzturn/caffe2,sf-wind/caffe2,bwasti/caffe2,xzturn/caffe2,sf-wind/caffe2,davinwang/caffe2,davinwang/caffe2,Yangqing/caffe2,sf-wind/caffe2,davinwang/caffe2,xzturn/caffe2,xzturn/caffe2,bwasti/caffe2,pietern/caffe2,bwasti/caffe2,davinwang/caffe2,pietern/caffe2,caffe2/caffe2,Yangqing/caffe2,bwasti/caffe2,Yangqing/caffe2,davinwang/caffe2,sf-wind/caffe2