fftw3 example not able to fetch files from conda repo

[vishank-u]

Hi,

I tried the fftw example to containerize a conda environment. However, it gives an error that it cannot find fftw3 in the channels. I have used the same def.yml file given in the example.

I also tried to replace fftw3 by fftw, it downloads the file but gives error in running the post install script:

cp: cannot stat 'fftw.cpp': No such file or directory