Given the age of the issue, I'm not sure this will be resolved. But the package is not respecting rules for Makefile in the .editorconfig file. Possibly related to this.
@shellscape Whatever you're observing, it likely isn't related to this issue (@florianb likely forgot to close this after #181 turned out to be unrelated.
Please file a new issue for this. Remember to include your local config and list of installed packages.
The current version messes the indent_size up (see #181)