diff --git a/scripts/linux/archlinux/install_dependencies.sh b/scripts/linux/archlinux/install_dependencies.sh
index bfa236627f9..3d54fdbfe9b 100755
--- a/scripts/linux/archlinux/install_dependencies.sh
+++ b/scripts/linux/archlinux/install_dependencies.sh
@@ -18,8 +18,12 @@ if [ $exit_code != 0 ]; then
 	exit $exit_code
 fi
 
+# get the root directory of this script
+ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
 # Update addon_config.mk files to use OpenCV 3 or 4 depending on what's installed
 addons_dir="$(readlink -f "$ROOT/../../../addons")"
+
 $(pkg-config opencv4 --exists)
 exit_code=$?
 if [ $exit_code != 0 ]; then
@@ -29,4 +33,4 @@ else
 	echo "Updating ofxOpenCV to use openCV4"
 	sed -i -E 's/ADDON_PKG_CONFIG_LIBRARIES =(.*)opencv\s/ADDON_PKG_CONFIG_LIBRARIES =\1opencv4 /g' "$addons_dir/ofxOpenCv/addon_config.mk"
 	sed -i -E 's/ADDON_PKG_CONFIG_LIBRARIES =(.*)opencv$/ADDON_PKG_CONFIG_LIBRARIES =\1opencv4/g' "$addons_dir/ofxOpenCv/addon_config.mk"
-fi
\ No newline at end of file
+fi