Disable source maps

[StfBauer]

I tried to use sass-embedded in Hugo with the following code:

    {{ $options := (dict
        "transpiler" "dartsass"
        "targetPath" "assets/css/main.css"
        "outputStyle" "compressed"
        "omitSourceMap" false
        "sourceMapEmbed" false
        "sourceMap" false
        "enableSourceMap" false
        "includePaths" (slice "./themes/akt/assets/"))
    }}
    {{- if not hugo.IsProduction }}
        NOT PRODUCTION
        {{ $options := (dict
            "transpiler" "dartsass"
            "targetPath" "assets/css/main.css"
            "outputStyle" "expanded"
            "enableSourceMap" true
            "includePaths"
            (slice "./themes/akt/assets/"))
        }}
    {{ end }}
    {{ $style := resources.Get "sass/main.scss" | toCSS $options | postCSS | fingerprint "sha256" }}
    <link rel="stylesheet" href="{{$style.Permalink}}" integrity="{{ $style.Data.Integrity }}">

I tried to disable the sourcempas but somehow I haven't succeeded in doing so.

What do I miss here?

Thanks is advance.