We're currently working on making this just work, but in the interim you can use the following instructions.
You can enable source maps by setting sourceMap: true in the options, but it's
likely that your SASS source files aren't in the output tree (and hence are not
available to your dev tools over HTTP), so you'll need to tell your dev tools
where to find the source files:
- Open DevTools > Sources
- Reveal the Sources pane on the left hand side (it might be hidden)
- Right-click and use Add folder to workspace to add your project as a Workspace
- Locate a SASS source files in the tree
- Right-click on one of them and use Map to File System Resource... to create the mapping