panic: reflect.Set: value of type *goldmark.markdown is not assignable to type []uint8

[zapateo]

This code, executed in Scriggo, panics the runtime:

package main

import (
	"io"
	"os"

	"github.com/open2b/scriggo"
	"github.com/yuin/goldmark"
)

func main() {
	fsys := scriggo.Files{
		"index.html": []byte(`{{ markdown("*b*") }}`),
	}
	md := goldmark.New()
	opts := &scriggo.BuildOptions{
		MarkdownConverter: func(src []byte, out io.Writer) error {
			return md.Convert(src, out)
		},
	}
	template, err := scriggo.BuildTemplate(fsys, "index.html", opts)
	if err != nil {
		panic(err)
	}
	err = template.Run(os.Stdout, nil, nil)
	if err != nil {
		panic(err)
	}
}

with this error:

panic: reflect.Set: value of type *goldmark.markdown is not assignable to type []uint8

This is a bit hard to debug because here we have Scriggo embedded inside Scriggo.