安装较旧版本的Theano（0.82）

Question

我已经从文件“ Anaconda2-5.3.0-Linux-x86_64.sh”安装了Anacondas。我正在使用Ubuntu 16.04。我正在尝试使用“ conda install theano = 0.82”命令安装theano = 0.82。这在上周有效，但是现在我收到此错误消息：

Solving environment: failed

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

  - theano==0.82

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.

我该怎么办？我尝试在anaconda页面上搜索，但找不到。