PackagesNotFoundError: The following packages are not available from current channels: - nsst 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.

这个错误提示说明在当前的channels中没有找到名为nsst的包。可能是因为conda-forge仓库中没有提供nsst包，或者你的channels配置不正确。

你可以尝试执行以下命令更新channels并安装nsst包：

conda config --add channels conda-forge
conda config --set channel_priority strict
conda update --all
conda install nsst

其中，`--set channel_priority strict`命令将设置channel的优先级为严格模式，这样可以避免包冲突。执行完上述命令后，重新安装nsst包。如果还是无法安装，可以根据错误提示中提供的链接搜索可用的channels并尝试安装。