SourceMappingURL Reference is missing the 'tmp' part or has too many .. references?

[SimonKaluza]

After following the helpful advice from @aexmachina in the broccoli-sass issue joliss/broccoli-sass#18 which details creating/mapping local filesystem directories and files in the Chrome workspace, I feel like I'm really close to the solution but I'm having one remaining issue.

The SourceMappingURL generated at the bottom of my app's output css file seems to need an extra 'tmp' in the URL reference. After creating a network mapping from the network file assets/my-app.css to temporary filesystem file (in the workspace) at my-app/tmp/tree_merger-tmp_dest_dir-eJSNaSPW.tmp/app/styles/my-app.css, the GET request for the mapping file that returns a 404 is to the URL http://localhost:4200/tree_merger-tmp_dest_dir-eJSNaSPW.tmp/app/styles/my-app.css.map.

Maybe the SourceMappingURL at the bottom should be something like /*# sourceMappingURL=../../tmp/tree_merger-tmp_dest_dir-eJSNaSPW.tmp/app/styles/my-app.css.map */ instead of /*# sourceMappingURL=../../tree_merger-tmp_dest_dir-eJSNaSPW.tmp/app/styles/my-app.css.map */ ? Or is there another way I could map my directory structure/change input/output file paths to better fit this?

[simonexmachina]

This has been caused by an issue from one of the modules we use. The problem should be fixed if you upgrade to the latest version 3.0.2.