diff --git a/desktop-environment/gnome.sh b/desktop-environment/gnome.sh
index 1e9b951..5ebb391 100644
--- a/desktop-environment/gnome.sh
+++ b/desktop-environment/gnome.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -19,9 +20,10 @@ if [[ -e /etc/systemd/system/display-manager.service ]]; then
     fi
 fi
 
-# Enables the GDM display manager so GNOME starts automatically on boot
+# Enables the GDM display manager so GNOME starts automatically on boot.
+# --force replaces an existing display-manager.service symlink when switching DMs.
 echo "Enabling GDM display manager"
-sudo systemctl enable gdm.service
+sudo systemctl enable --force gdm.service
 
 # Enables NetworkManager so networking works out of the box in GNOME
 echo "Enabling NetworkManager"
diff --git a/desktop-environment/kde-plasma.sh b/desktop-environment/kde-plasma.sh
index b0aed8b..4ff1d85 100644
--- a/desktop-environment/kde-plasma.sh
+++ b/desktop-environment/kde-plasma.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -18,9 +19,10 @@ if [[ -e /etc/systemd/system/display-manager.service ]]; then
     fi
 fi
 
-# Enables the SDDM display manager so KDE Plasma starts automatically on boot
+# Enables the SDDM display manager so KDE Plasma starts automatically on boot.
+# --force replaces an existing display-manager.service symlink when switching DMs.
 echo "Enabling SDDM display manager"
-sudo systemctl enable sddm.service
+sudo systemctl enable --force sddm.service
 
 # Enables NetworkManager so networking works out of the box in Plasma
 echo "Enabling NetworkManager"
diff --git a/intel/intel-drivers.sh b/intel/intel-drivers.sh
index 330531d..2606ea2 100755
--- a/intel/intel-drivers.sh
+++ b/intel/intel-drivers.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then