diff --git a/after.sh b/after.sh
index d60997e..34c751b 100644
--- a/after.sh
+++ b/after.sh
@@ -14,11 +14,8 @@ USER_HOME="/home/$USERNAME"
 # ─────────────────────────────────────
 # Temporarily enable passwordless sudo
 # ─────────────────────────────────────
-SUDOERS_FILE="/etc/sudoers.d/00_$USERNAME"
-
-printf '%s ALL=(ALL:ALL) NOPASSWD: ALL\n' "$USERNAME" > "$SUDOERS_FILE"
-chmod 440 "$SUDOERS_FILE"
-visudo -c || exit 1
+install -m 440 /dev/stdin "/etc/sudoers.d/00_$USERNAME" <<< "$USERNAME ALL=(ALL:ALL) NOPASSWD: ALL"
+visudo -c
 
 # ─────────────────────────────────────
 # Misc
@@ -189,8 +186,7 @@ cd "$OLDPWD" && rm -rf grub2
 EOF
 
 # Restore password requirement after successful installation
-printf '%s ALL=(ALL) ALL\n' "$USERNAME" > "$SUDOERS_FILE"
-chmod 440 "$SUDOERS_FILE"
+install -m 440 /dev/stdin "/etc/sudoers.d/00_$USERNAME" <<< "$USERNAME ALL=(ALL) ALL"
 visudo -c
 
 # Remove the script from root folder after successfull installation