Problem with non-value attributes?

[noamyg]

I'm running this on an index.html generated by angular-cli (ng build):

let gulp = require('gulp')
let inline = require('gulp-inline')

gulp.task('inline', async function () {
    await gulp.src('dist/index.html')
    .pipe(inline({
        base: 'dist/',
        disabledTypes: 'css, svg, img'
    }))
    .pipe(gulp.dest('dist/'));
});

Some script tags are created as following:
<script src="runtime-es5.1eba213af0b233498d9d.js" nomodule defer>

But the result looks like that:
<script nomodule="defer="></script>