`gulp build` sass/css tasks create duplicate css files

[jimhotchkin-wf]

When running gulp build the css generated from the ./sass files is duplicated under the ./build directory:

build
├── build
│   └── css
│       ├── app.css
│       └── app_ie.css
├── css
│   ├── app.css
│   └── app_ie.css
├── img
│   ├── tour-retina-seb451b19e0.png
│   └── tour-s5a6a31895b.png
└── src
    ├── app.js
    ├── appConfig.js

My build task tree is as follows:

build: {
        include: ['compass', 'copy:vendorLibs'],
        exclude: ['sass']
        }

My customized paths are as follows:

path: {
        buildDeps: './build/deps/',
        vendorLibs: './dist/vendor/',
        styleIncludePaths: ['jspm_packages/github/Workiva/web-skin@0.4.16/sass/']
    }

[maxwellpeterson-wf]

This must be a result of some kind of compass config. Will need to look into it in more detail