How to compile sass / scss without creating map files

Question

I went looking for this answer and noticed it is not yet on Stack Overflow. So I hope to share this knowledge for anyone in need.

Situation:

In the command line: compiling compressed SASS files from the scss folder into the css folder.

sass --watch scss:css --style compressed

This creates css files, but it also creates .map files as well.

Question:

So how do I stop these .map files from being created?

Answer 1

Update for 2019

Running --sourcemap-none on the latest version of sass (1.21.0) returns Could not find an option named "sourcemap".

The new flag is --no-source-map.

━━━ Source Maps ━━━━━━━━━━━━━━━━━━━━━━━━
--[no-]source-map          Whether to generate source maps.
                           (defaults to on)

--source-map-urls          How to link from source maps to source files.
                           [relative (default), absolute]

--[no-]embed-sources       Embed source file contents in source maps.
--[no-]embed-source-map    Embed source map contents in CSS.

Also, sass is one of the many CLI programs with built-in help output. Running sass without any arguments shows usage instruction and various flags, like this one.

Answer 2

Update, now the proper command to avoid creating a map file is:

--no-source-map