diff --git a/pkg/machinedriver/crcimageprovider.go b/pkg/machinedriver/crcimageprovider.go
index fc91c3fc..4e4a494c 100644
--- a/pkg/machinedriver/crcimageprovider.go
+++ b/pkg/machinedriver/crcimageprovider.go
@@ -92,6 +92,8 @@ func (puller *CrcImagePuller) Download() error {
 
 	slog.Info(fmt.Sprintf("%+v", puller))
 	slog.Info("file copy", "source", puller.sourcePath, "dest", imagePath.GetPath())
+	/* need to use qemu-img with a backing file on linux */
+	/* https://github.com/crc-org/crc/blob/7b69395ff79eeb60c9c9f871933b1b09eb8691f4/pkg/drivers/vfkit/driver_darwin.go#L129-L136 */
 	if err := copyFile(puller.sourcePath, imagePath.GetPath()); err != nil {
 		return err
 	}