diff --git a/README.md b/README.md
index 2fb2a8d..059c785 100644
--- a/README.md
+++ b/README.md
@@ -111,7 +111,7 @@ This creates two files:
 
 ### 7. Check the detected bootloader
 
-Check inn `/mnt/etc/nixos/configuration.nix`, that the bootloader is configured like this:
+Check in `/mnt/etc/nixos/configuration.nix`, that the bootloader is configured like this:
 
 ```nix
 {
@@ -132,7 +132,7 @@ nixos-install
 reboot
 ```
 
-### 9. Nach dem ersten Start
+### 9. After the first reboot
 
 ```bash
 curl --output release.tar.gz https://gitea.fischer.im/sebastian/nixos-cesium/archive/[0.0.2].tar.gz
@@ -140,6 +140,7 @@ tar xzf release.tar.gz
 chmod 744 nixos-cesium/script/post-install.sh
 ./nixos-cesium/script/post-install.sh
 ```
+
 If you don't use the post-installation script, follow the next step
 
 ```bash
diff --git a/scripts/minimal-install.sh b/scripts/minimal-install.sh
index 623a60c..179cb28 100755
--- a/scripts/minimal-install.sh
+++ b/scripts/minimal-install.sh
@@ -11,7 +11,7 @@ DEFAULT_DISK="/dev/sda"
 read -p "Disk to install to [${DEFAULT_DISK}]: " DISK
 DISK="${DISK:-$DEFAULT_DISK}"
 
-if [ ! -b "$DISK" ]; then
+if [ ! -b "${DISK}" ]; then
     echo "Error: ${DISK} is not a valid block device."
     exit 1
 fi
@@ -19,8 +19,8 @@ fi
 echo "Using disk: ${DISK}"
 
 # Partitioning
-read -p "Create partitions table? DELETES ALL DATA! (j/N): " answer
-if [ "$answer" = "j" ] || [ "$answer" = "J" ]; then
+read -p "Create partitions table? DELETES ALL DATA! (j/N): " ANSWER
+if [ "${ANSWER}" = "j" ] || [ "${ANSWER}" = "J" ]; then
     # GPT-partition table
     parted "${DISK}" -- mklabel gpt
 
@@ -45,8 +45,8 @@ mkfs.fat -F 32 -n boot ${DISK}1
 mkswap -L swap ${DISK}2
 mkfs.ext4 -L nixos ${DISK}3
 
-read -p "Format Home-partition? Deletes all userdata! (j/N): " answer
-if [ "$answer" = "j" ] || [ "$answer" = "J" ]; then
+read -p "Format Home-partition? Deletes all userdata! (j/N): " ANSWER
+if [ "${ANSWER}" = "j" ] || [ "${ANSWER}" = "J" ]; then
     # Format home-partition
     mkfs.ext4 -L home ${DISK}4
 fi
diff --git a/scripts/post-install.sh b/scripts/post-install.sh
index 9d354ef..58e974b 100755
--- a/scripts/post-install.sh
+++ b/scripts/post-install.sh
@@ -4,6 +4,29 @@ sudo -i
 
 cp -r ~/nixos-cesium/config/* /etc/nixos/
 
+# VM module activation
+echo ""
+echo "Activate a VM module?"
+echo "  1) vm-guest.nix (VM runs inside a hypervisor)"
+echo "  2) vm-host.nix  (System runs VMs via libvirtd)"
+echo "  n) None"
+read -p "Selection [n]: " VM_CHOICE
+VM_CHOICE="${VM_CHOICE:-n}"
+
+case "${VM_CHOICE}" in
+    1)
+        sed -i 's|# ./vm-guest.nix|./vm-guest.nix|' /etc/nixos/configuration.nix
+        echo "vm-guest.nix activated."
+        ;;
+    2)
+        sed -i 's|# ./vm-guest.nix|./vm-host.nix|' /etc/nixos/configuration.nix
+        echo "vm-host.nix activated."
+        ;;
+    *)
+        echo "No VM module activated."
+        ;;
+esac
+
 nix-channel --add https://github.com/nix-community/home-manager/archive/release-25.11.tar.gz home-manager
 nix-channel --update