Several versions of almond can be installed side-by-side. This is useful e.g. to have kernels for several Scala versions, or to test newer / former almond versions.
To install several version of the kernel side-by-side, just ensure the different installed versions have different ids (required) and display names (recommended).
For example, let's install almond for the scala
$ cs launch almond --scala 2.13.0 -- --install
This installs almond with the default kernel id,
scala, and default display name, "Scala".
Now let's also install almond for scala
$ cs launch almond:0.10.9 --scala 2.12.9 \ -- --install --id scala212 --display-name "Scala (2.12)"
--id scala212 ensures this kernel is installed along side the former, in a directory with a different name.
--display-name "Scala (2.12)" ensures users can differentiate both kernels, with the latter appearing in front-ends under the name "Scala (2.12)".