Workaround to declare a local variable in a Sass file

// This certainly is not the best way to do this.
// But I couldn't find an approach using the Sass elements for now. If you have a better approach please let me know.

// convention to a local variable
$_local: (
  // some stuff here
);

// if we need to add new entries that depends of the other ones we can do this:
$_local: map-merge(
  $_local,
  (
    // more stuff here
  )
);

...
...
...

// overriding the definitions
$_local: null;