Conda install matplotlib I'm replicating my Python 3. 7 Conda environment for Python 3. 8 on an Ubuntu 18. 04 system. 8 as the sole requirement. Then I started installing packages from my 3. 7 environment. Most of the process went swimmingly, but matplotlib failed. Conda search shows a 3. 8 version of matplotlib, but the conda install command is unable to resolve... Cannot install matplotlib in ..