Can't install via conda or mamba on Windows

Issue: Can't install via conda nor mamba on my Windows PC. Recently installed it on Mac yesterday (i'll check if can install it again today).

I tried the following commands:

conda config --add channels conda-forge
conda install sage
conda install sage -c conda-forge
conda create -n sage sage
conda create -n sage sage -c conda-forge
mamba install sage
mamba install sage -c conda-forge
mamba create -n sage sage
mamba create -n sage sage -c conda-forge

And I'm always met with either

Collecting package metadata (current_repodata.json): done
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - sage

Current channels:

  - https://conda.anaconda.org/conda-forge/win-64
  - https://conda.anaconda.org/conda-forge/noarch
  - https://repo.anaconda.com/pkgs/main/win-64
  - https://repo.anaconda.com/pkgs/main/noarch
  - https://repo.anaconda.com/pkgs/r/win-64
  - https://repo.anaconda.com/pkgs/r/noarch
  - https://repo.anaconda.com/pkgs/msys2/win-64
  - https://repo.anaconda.com/pkgs/msys2/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

                  __    __    __    __
                 /  \  /  \  /  \  /  \
                /    \/    \/    \/    \
███████████████/  /██/  /██/  /██/  /████████████████████████
              /  / \   / \   / \   / \  \____
             /  /   \_/   \_/   \_/   \    o \__,
            / _/                       \_____/  `
            |/
        ███╗   ███╗ █████╗ ███╗   ███╗██████╗  █████╗
        ████╗ ████║██╔══██╗████╗ ████║██╔══██╗██╔══██╗
        ██╔████╔██║███████║██╔████╔██║██████╔╝███████║
        ██║╚██╔╝██║██╔══██║██║╚██╔╝██║██╔══██╗██╔══██║
        ██║ ╚═╝ ██║██║  ██║██║ ╚═╝ ██║██████╔╝██║  ██║
        ╚═╝     ╚═╝╚═╝  ╚═╝╚═╝     ╚═╝╚═════╝ ╚═╝  ╚═╝

        Supported by @QuantStack

        GitHub:  https://github.com/QuantStack/mamba
        Twitter: https://twitter.com/QuantStack

█████████████████████████████████████████████████████████████

Getting  conda-forge win-64
Getting  conda-forge noarch
Getting  pkgs/main win-64
Getting  pkgs/main noarch
Getting  pkgs/r win-64
Getting  pkgs/r noarch
Getting  pkgs/msys2 win-64
Getting  pkgs/msys2 noarch

Looking for: ['sage']

65006 packages in https://conda.anaconda.org/conda-forge/win-64
20907 packages in https://conda.anaconda.org/conda-forge/noarch
5023 packages in https://repo.anaconda.com/pkgs/r/noarch
1122 packages in https://repo.anaconda.com/pkgs/main/noarch
13807 packages in https://repo.anaconda.com/pkgs/main/win-64
4224 packages in https://repo.anaconda.com/pkgs/r/win-64
471 packages in https://repo.anaconda.com/pkgs/msys2/win-64
0 packages in https://repo.anaconda.com/pkgs/msys2/noarch
Encountered problems while solving.
Problem: nothing provides requested sage

Environment (conda list):

``` C:\Users\dkhodabakhsh>conda list # packages in environment at C:\Users\dkhodabakhsh\AppData\Local\Continuum\miniconda3: # # Name Version Build Channel ca-certificates 2019.11.28 hecc5488_0 conda-forge certifi 2019.11.28 py37_0 conda-forge cffi 1.13.2 py37hb32ad35_0 conda-forge chardet 3.0.4 py37_1003 conda-forge conda 4.8.0 py37_1 conda-forge conda-package-handling 1.6.0 py37h2fa13f4_1 conda-forge console_shortcut 0.1.1 3 cryptography 2.8 py37hb32ad35_1 conda-forge idna 2.8 py37_1000 conda-forge libsolv 0.7.10 h1a1b453_0 conda-forge mamba 0.1.0 py37h1ad3211_2 conda-forge menuinst 1.4.16 py37_0 conda-forge openssl 1.1.1d hfa6e2cd_0 conda-forge pip 19.3.1 py37_0 conda-forge powershell_shortcut 0.0.1 2 pycosat 0.6.3 py37hfa6e2cd_1002 conda-forge pycparser 2.19 py37_1 conda-forge pyopenssl 19.1.0 py37_0 conda-forge pysocks 1.7.1 py37_0 conda-forge python 3.7.6 h5b45d93_2 conda-forge pywin32 225 py37hfa6e2cd_0 conda-forge requests 2.22.0 py37_1 conda-forge ruamel_yaml 0.15.80 py37hfa6e2cd_1000 conda-forge setuptools 45.0.0 py37_1 conda-forge six 1.14.0 py37_0 conda-forge sqlite 3.30.1 hfa6e2cd_0 conda-forge tqdm 4.41.1 py_0 conda-forge urllib3 1.25.7 py37_0 conda-forge vc 14.1 h0510ff6_4 vs2015_runtime 14.16.27012 hf0eaf9b_1 wheel 0.33.6 py37_0 conda-forge win_inet_pton 1.1.0 py37_0 conda-forge wincertstore 0.2 py37_1003 conda-forge yaml 0.2.2 hfa6e2cd_1 conda-forge zlib 1.2.11 h2fa13f4_1006 conda-forge ```

Details about conda and system ( conda info ):

``` C:\Users\dkhodabakhsh>conda info active environment : None user config file : C:\Users\dkhodabakhsh\.condarc populated config files : C:\Users\dkhodabakhsh\.condarc conda version : 4.8.0 conda-build version : not installed python version : 3.7.6.final.0 virtual packages : base environment : C:\Users\dkhodabakhsh\AppData\Local\Continuum\miniconda3 (writable) channel URLs : https://conda.anaconda.org/conda-forge/win-64 https://conda.anaconda.org/conda-forge/noarch https://repo.anaconda.com/pkgs/main/win-64 https://repo.anaconda.com/pkgs/main/noarch https://repo.anaconda.com/pkgs/r/win-64 https://repo.anaconda.com/pkgs/r/noarch https://repo.anaconda.com/pkgs/msys2/win-64 https://repo.anaconda.com/pkgs/msys2/noarch package cache : C:\Users\dkhodabakhsh\AppData\Local\Continuum\miniconda3\pkgs C:\Users\dkhodabakhsh\.conda\pkgs C:\Users\dkhodabakhsh\AppData\Local\conda\conda\pkgs envs directories : C:\Users\dkhodabakhsh\AppData\Local\Continuum\miniconda3\envs C:\Users\dkhodabakhsh\.conda\envs C:\Users\dkhodabakhsh\AppData\Local\conda\conda\envs platform : win-64 user-agent : conda/4.8.0 requests/2.22.0 CPython/3.7.6 Windows/10 Windows/10.0.18362 administrator : False netrc file : None offline mode : False ```

conda-forge / sage-feedstock

Can't install via conda or mamba on Windows #52