AppVeyor CI failing due to micromamba update

[pont-us]

https://ci.appveyor.com/project/bcdev/xcube-cds/builds/50678360/job/qqq2skqw0hrg8p3m :

./micromamba shell init -s bash --root-prefix ~/micromamba
Modifying RC file "/home/appveyor/.bashrc"
Generating config for root prefix "/home/appveyor/micromamba"
Setting mamba executable to: "/home/appveyor/projects/xcube-cds/micromamba"
Adding (or replacing) the following in your "/home/appveyor/.bashrc" file
# >>> mamba initialize >>>
# !! Contents within this block are managed by 'micromamba shell init' !!
export MAMBA_EXE='/home/appveyor/projects/xcube-cds/micromamba';
export MAMBA_ROOT_PREFIX='/home/appveyor/micromamba';
__mamba_setup="$("$MAMBA_EXE" shell hook --shell bash --root-prefix "$MAMBA_ROOT_PREFIX" 2> /dev/null)"
if [ $? -eq 0 ]; then
    eval "$__mamba_setup"
else
    alias micromamba="$MAMBA_EXE"  # Fallback on help from micromamba activate
fi
unset __mamba_setup
# <<< mamba initialize <<<
source ~/.bashrc
source ~/.profile
hash -r
mkdir -p ~/micromamba/pkgs/
export MAMBA_ROOT_PREFIX=~/micromamba
export MAMBA_EXE=$(pwd)/micromamba
. $MAMBA_ROOT_PREFIX/etc/profile.d/micromamba.sh
/opt/appveyor/build-agent/bash-shell.sh: line 51: /home/appveyor/micromamba/etc/profile.d/micromamba.sh: No such file or directory