cntk depends on removed nccl

[yan12125]

sudo pacman -S cntk
resolving dependencies...
warning: cannot resolve "nccl", a dependency of "cntk"
:: The following package cannot be upgraded due to unresolvable dependencies:
      cntk

:: Do you want to skip the above package for this upgrade? [y/N] n
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'nccl' required by cntk

[petronny]

1. nccl的协议不允许分发
2. cntk现在还不支持python3.7(Python 3.7 support microsoft/CNTK#3354 )，现在无法编译