Hi,
I would like to install pytorch version 0.4.1 with cuda 8.0 with python 3.6.
When I run conda info pytorch, there is one block as follows:
pytorch 0.4.1 py36_cuda8.0.61_cudnn7.1.2_1
------------------------------------------
file name   : pytorch-0.4.1-py36_cuda8.0.61_cudnn7.1.2_1.tar.bz2
name        : pytorch
version     : 0.4.1
build string: py36_cuda8.0.61_cudnn7.1.2_1
build number: 1
channel     : https://conda.anaconda.org/pytorch/linux-64
size        : 391.6 MB
arch        : x86_64
constrains  : ()
features    : cuda80
license     : BSD 3-Clause
license_family: BSD
md5         : 4a9f893e6ff0de7e7e3055d3eb5b6ba0
platform    : linux
subdir      : linux-64
timestamp   : 1532582636355
url         : https://conda.anaconda.org/pytorch/linux-64/pytorch-0.4.1-py36_cuda8.0.61_cudnn7.1.2_1.tar.bz2
dependencies:
    cffi
    cudatoolkit 8.*
    mkl >=2018
    ninja
    numpy >=1.11
    python >=3.6,<3.7.0a0

However, when I run conda install -c pytorch pytorch=0.4.1 cudatoolkit=8 I got the following error:
Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - cudatoolkit=8
  - pytorch=0.4.1
Use "conda info <package>" to see the dependencies for each package.

Additional information:
when I run conda search pytorch=0.4.1, I got
Loading channels: done
# Name                  Version           Build  Channel             
pytorch                   0.4.1 py27_cuda8.0.61_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py27_cuda9.0.176_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py27_cuda9.2.148_cudnn7.1.4_1  pytorch             
pytorch                   0.4.1  py27ha74772b_0  pkgs/main           
pytorch                   0.4.1 py35_cuda8.0.61_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py35_cuda9.0.176_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py35_cuda9.2.148_cudnn7.1.4_1  pytorch             
pytorch                   0.4.1  py35ha74772b_0  pkgs/main           
pytorch                   0.4.1 py36_cuda8.0.61_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py36_cuda9.0.176_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py36_cuda9.2.148_cudnn7.1.4_1  pytorch             
pytorch                   0.4.1  py36ha74772b_0  pkgs/main           
pytorch                   0.4.1 py37_cuda8.0.61_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py37_cuda9.0.176_cudnn7.1.2_1  pytorch             
pytorch                   0.4.1 py37_cuda9.2.148_cudnn7.1.4_1  pytorch             
pytorch                   0.4.1  py37ha74772b_0  pkgs/main

But running conda install -c pytorch pytorch=0.4.1=py36_cuda8.0.61_cudnn7.1.2_1 yields PackageNotFoundError, while conda install -c pytorch pytorch=0.4.1=py36_cuda9.0.176_cudnn7.1.2_1 does not have any problem.
Can anybody help through this?
Many thanks.