Error: This file is already being imported.
@import 'alpha';
        ^^^^^^^
  spec/libsass-issues/issue_1801/import-cycle/_beta.scss 1:9   @import
  spec/libsass-issues/issue_1801/import-cycle/_alpha.scss 1:9  @import
  spec/libsass-issues/issue_1801/import-cycle/input.scss 1:9   root stylesheet
