@@ -6,6 +6,7 @@ "encoding/xml"
 	"net/url"
 	"time"
 
+	"gitlab.com/tozd/go/errors"
 	"go.alanpearce.eu/homestead/internal/config"
 )
 
@@ -13,18 +14,18 @@ func MakeTagURI(config *config.Config, specific string) string {
 	return "tag:" + config.OriginalDomain + "," + config.DomainStartDate + ":" + specific
 }
 
-func LinkXSL(w *bytes.Buffer, url string) error {
+func LinkXSL(w *bytes.Buffer, url string) errors.E {
 	_, err := w.WriteString(`<?xml-stylesheet href="`)
 	if err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 	err = xml.EscapeText(w, []byte(url))
 	if err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 	_, err = w.WriteString(`" type="text/xsl"?>`)
 	if err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 
 	return nil