No sourcemap for CSS

I have just upgraded to Jekyll 4.0.0 which includes its own sass.

Previously, sass uses sourcemap=none by default.

Now, sass uses sourcemap=auto by default (and auto defaults to true).

How can I disable generation of sass sourcemaps?

I expected one of the following to disable sass sourcemaps:

_config,yml

sass:
  sourcemap: none

_config,yml (using flag for newer versions of sass)

sass:
  no-source-map: true

The strange thing is if I change the value in the key-value pair to an invalid argument, I get an error message from sass (as expected). This must mean the arguments in the config files above are correct, but not being used.

Solution

Jekyll Sass Converter has updated their Github readme after a request was made 7 days ago I believe.

Excerpt from release:

sourcemap

Controls when source maps shall be generated.

never — causes no source maps to be generated at all.
always — source maps will always be generated.
development — source maps will only be generated if the site is in development environment. That is, when the environment variable JEKYLL_ENV is set to development.

Defaults to always.

The info can be found here: https://github.com/jekyll/jekyll-sass-converter#source-maps