Wrong paths for css source maps

[webpack-bot]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
Source maps for scss files produced by webpack contains duplicate parts like C:\...C:\...\some-file.scss.
I'd like to use relative paths but I can't understand why webpack use absolute paths for css files.

If the current behavior is a bug, please provide the steps to reproduce.
There is my loaders configuration for scss files:

loader: [
    "style-loader",
    {
        loader: "css-loader",
        options: {
            sourceMap: true,
            minimize: true,
            importLoaders: 2
        }
    },
    {
        loader: "postcss-loader",
        options: {
            sourceMap: true,
            plugins: function () {
                return [
                    require("autoprefixer")({
                        browsers: ["last 4 versions"]
                    })
                ];
            }
        }
    },
    {
        loader: "sass-loader",
        options: {
            sourceMap: true
        }
    },
    "sass-bulk-import-loader"
]

What is the expected behavior?
The source map file have to containe one absolute or relative path to the source file.

If this is a feature request, what is motivation or use case for changing the behavior?

Please mention other relevant information such as the browser version, Node.js version, webpack version and Operating System.
webpack 2.2,1 but I also tested with 2.6.1 and the problem is the same
node.js 7.7.4
"style-loader": "^0.13.1"
"css-loader": "^0.28.4",
"postcss-loader": "^2.0.5",
"autoprefixer": "^7.1.1",
"node-sass": "^4.5.2",
"sass-loader": "^6.0.5"
Windows 7

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This issue was moved from webpack/webpack#5016 by @evilebottnawi. Orginal issue was by @katzz0.

[alexander-akait]

Closing in favor #652