diff --git a/README.md b/README.md
index b859309..08b2c13 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,7 @@ The following environment variables are supported:
 
 * `RELEASE` (Default: bullseye)
 
-   The release version to build images against. Valid values are jessie, stretch
+   The release version to build images against. Valid values are jessie, stretch,
    buster, bullseye, and testing.
 
  * `APT_PROXY` (Default: unset)
diff --git a/imagetool.sh b/imagetool.sh
index e8467e1..002b50b 100755
--- a/imagetool.sh
+++ b/imagetool.sh
@@ -25,7 +25,7 @@ Usage:
      -p, --mount-point    mount point for image
 
    This tool will use /dev/nbd1 as default for mounting an image. If you want to use another device, execute like this:
-   NBD_DEV=/dev/nbd2 ./$progname --mount --image <your image> --mount-point <your path>
+   NBD_DEV=/dev/nbd2 ./$progname --mount --image-name <your image> --mount-point <your path>
 
 HEREDOC
 }
diff --git a/stage2/01-sys-tweaks/01-run.sh b/stage2/01-sys-tweaks/01-run.sh
index c1836f9..bb3e11a 100755
--- a/stage2/01-sys-tweaks/01-run.sh
+++ b/stage2/01-sys-tweaks/01-run.sh
@@ -52,7 +52,7 @@ on_chroot <<EOF
 for GRP in input spi i2c gpio; do
 	groupadd -f -r "\$GRP"
 done
-for GRP in adm dialout cdrom audio users sudo video games plugdev input gpio spi i2c netdev; do
+for GRP in adm dialout cdrom audio users sudo video games plugdev input gpio spi i2c netdev render; do
   adduser $FIRST_USER_NAME \$GRP
 done
 EOF