Issues with conda: 1. bioconda channel is not added by default (see [this issue on github](https://github.com/sylabs/singularity/issues/5094), 2. conda singularity recipes does not work when trying to run the image (build works but when running as a basic user (not root), conda is installed in /usr/local and singularity is trying to write into a tmp directory in /usr/local). Maybe a more complex conda recipe would work: https://github.com/sylabs/singularity/issues/5075 Indeed, I think conda needs at least to create and initiate an environment. Moreover, we could automate the runscript line to fit the conda installed program or add a `%app` dedicated section.