Libsass: A expressão de consulta de mídia deve começar com '('

<strong i="5">@media</strong> all and (min-width: 901pt)                          { <strong i="6">@import</strong> "l-xl.scss" }
<strong i="7">@media</strong> all and (min-width: 601pt)  and (max-width: 900pt)  { <strong i="8">@import</strong> "m-l.scss"  }
<strong i="9">@media</strong> all and (min-width: 241pt)  and (max-width: 900pt)  { <strong i="10">@import</strong> "s-m.scss"  }
<strong i="11">@media</strong> all                         and (max-width: 900pt)  { <strong i="12">@import</strong> "xs-m.scss" }
<strong i="13">@media</strong> all                         and (max-width: 600pt)  { <strong i="14">@import</strong> "xs-s.scss" }

<strong i="15">@media</strong> all and (min-width: 1601pt)                         { <strong i="16">@import</strong> "xl.scss" }
<strong i="17">@media</strong> all and (min-width: 901pt)  and (max-width: 1600pt) { <strong i="18">@import</strong> "l.scss"  }
<strong i="19">@media</strong> all and (min-width: 601pt)  and (max-width: 900pt)  { <strong i="20">@import</strong> "m.scss"  }
<strong i="21">@media</strong> all and (min-width: 241pt)  and (max-width: 600pt)  { <strong i="22">@import</strong> "s.scss"  }
<strong i="23">@media</strong> all                         and (max-width: 240pt)  { <strong i="24">@import</strong> "xs.scss" }

O erro:

/~/css-loader?importLoaders=2&sourceMap!./~/autoprefixer-loader?browsers=last 2 version!./~/sass-loader?outputStyle=exp
nded&sourceMap=true&sourceMapContents=true!./assets/styles/style.scss
odule build failed:
media all and (min-width: 901pt)                          { <strong i="28">@import</strong> "l-xl.scss" }
                                                                              ^
     Media query expression must begin with '('
     in G:\work\3\webapp\assets\styles\style.scss (line 363, column 81)
rror:
media all and (min-width: 901pt)                          { <strong i="29">@import</strong> "l-xl.scss" }
                                                                              ^
     Media query expression must begin with '('
     in G:\work\3\webapp\assets\styles\style.scss (line 363, column 81)
   at options.error (G:\work\3\webapp\node_modules\node-sass\lib\index.js:277:32)
@ ./assets/styles/style.scss 4:14-281 13:2-17:4 14:20-287