Error logged during workflow execution

[gcatanese]

Describe the bug
All scripts used in the workflows log the same error/warning:

/usr/src/app/generateAll.sh: 4: [[: not found

It looks like the IF statement in the script does not work correctly

# Sets working tools
if [[ $OSTYPE == 'darwin'* ]]; then
  echo "MacOS detected. Alias sed to gsed."
  alias sed=gsed
fi

Check Github Action logs

Expected behavior
No error should be logged during the execution of the workflow