picrust2 installation on a virtual machine

Hi, I'm working with qiime2-2021.1 in a virtual machine (virtual box).

I have tried installing the picrust2 plugin but can't succeed doing so:

  • I first tried installing as listed in the main page of the plugin:
    conda install q2-picrust2=2021.11 -c conda-forge -c bioconda -c gavinmdouglas
    but got an error.

  • I then tried to install manually as listed here (Installation · picrust/picrust2 Wiki · GitHub), but after the installation ended I can't find the plugin in my environment when I write qiime --help.

Any idea for the best way installing on a VM?