I feel dumb: I try to create/modify my own theme, but I can’t compile any css.
I use the scss.sh script, but I always end up with a scss: command not found error message.
Of course I already did install sass: I tried using npm globally, then falled back to homebrew in order to speed up everything, as recommended by the sass install page.
Sorry for reviving this old thread, but for the record, it is not necessary that the scss command be available: if sass is installed and available, you can use that instead.
So rather than running scss --watch scss:css-compiled (which is the sole content of the scss.sh script), you can run sass --watch scss:css-compiled.