Почему imagemin удаляет содержимое svg файла?

gulp.task('build:img', function() { 
  gulp.src(path.src.img) 
    .pipe(imagemin({ 
      progressive: true, 
      svgoPlugins: [{ 
        removeViewBox: false 
      }], 
      use: [pngquant()], 
      interlaced: true 
    })) 
    .pipe(gulp.dest(path.build.img)) 
    .pipe(browserSync.reload({ 
      stream: true 
    })) 
})

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