micromamba fails to activate env inside apptainer

[kpetrov]

Hello,

I am trying to run micromamba inside a container (v2.0.2). Standard procedure works well outside the container on my RHEL 8.6.

  complete -o default -F _umamba_bash_completions micromamba
fi
+ basename /usr/local/bin/micromamba
+ __exe_name=micromamba
+ __exe_name=micromamba
+ [[ micromamba == micromamba ]]
/.post.script: 55: eval: [[: not found
+ [[ micromamba == mamba ]]
/.post.script: 57: eval: [[: not found
+ echo Error unknow MAMBA_EXE: "/usr/local/bin/micromamba", filename must be mamba or micromamba
Error unknow MAMBA_EXE: "/usr/local/bin/micromamba", filename must be mamba or micromamba
+ [ -z  ]
+ export CONDA_SHLVL=0
+ export PATH=/opt/micromamba/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ [ -z x ]
/.post.script: 88: eval: Syntax error: "(" unexpected (expecting "}")
FATAL:   While performing build: while running engine: while running %post section: exit status 2

this is my apptainer code (based off ubuntu 22.04):

 export MAMBA_ROOT_PREFIX=/opt/micromamba
    curl -Ls https://micro.mamba.pm/api/micromamba/linux-64/latest | tar -xvj -C /usr/local/bin --strip-components=1  bin/micromamba 
    eval "$(micromamba shell hook -s bash)"
    # Create base environment
    micromamba create -n base -c conda-forge python=3.11
    # Activate
    micromamba activate

Am I doing it wrong it is it an actual problem?

thanks in advance!

k.