diff --git a/install.sh b/install.sh
index b6ea571..ed1e80d 100755
--- a/install.sh
+++ b/install.sh
@@ -1,13 +1,15 @@
 #!/usr/bin/env bash
 
+run_directory=$(dirname "$0")
+
 if [ -f $run_directory/.disabled ]; then
   echo "Installation is disabled. Exiting..."
   exit 0
 fi
 
 echo "Copying Systemd units to system directory..."
-sudo cp $(dirname "$0")/systemd-templates/dns-update.service /etc/systemd/system/
-sudo cp $(dirname "$0")/systemd-templates/dns-update.timer /etc/systemd/system/
+sudo cp $run_directory/systemd-templates/dns-update.service /etc/systemd/system/
+sudo cp $run_directory/systemd-templates/dns-update.timer /etc/systemd/system/
 sudo sed -i -e "s/PH_USER/$(whoami)/g" /etc/systemd/system/dns-update.service
 sudo sed -i -e "s:PH_DIRECTORY:$(pwd):g" /etc/systemd/system/dns-update.service