Laravel Elixir not working properly on Ubuntu

I have simple SCSS file:

@import '../template_outgame.scss';

div#main-container {
    div#content {
        div#inside {
            table#games-table {
                tr {
                    th {
                        @extend .text-center;
                    }

                    td {
                        &:nth-child(3), &:nth-child(4), &:nth-child(5) {
                            @extend .text-center;
                        }

                        img {
                            @include border(1px solid #777);
                            display: block;
                            margin: auto;
                            opacity: .8;
                            width: 50px;
                        }
                        img:hover {
                            border-color: #888;
                            opacity: 1;
                        }

                        div.map-name {
                            font-size: 11px;
                            margin-top: 2px;
                            line-height: .93;
                        }

                        form {
                            input[type="submit"] {
                                float: none;
                                max-width: 150px;
                                min-width: 48px;
                            }
                        }
                    }
                }
            }
        }
    }
}

When I execute gulp on my laptop (Win7) it's working fine. But when I run gulp on my Ubuntu server this part of code

&:nth-child(3), &:nth-child(4), &:nth-child(5) {
    @extend .text-center;
}

compile wrong.

Only for third child have text-align: center; style. Child 4 and 5 don't have this style and they are sad. th element above working fine too. What I do wrong?

via Chebli Mohamed