diff --git a/non_graf_installer/python-installer/opengnsys_installer-v2.sh b/non_graf_installer/python-installer/opengnsys_installer-v2.sh
index 1428a6e..1eb9aa4 100755
--- a/non_graf_installer/python-installer/opengnsys_installer-v2.sh
+++ b/non_graf_installer/python-installer/opengnsys_installer-v2.sh
@@ -11,6 +11,10 @@ DEVEL=$1
 
 if [ "$DEVEL" == "devel" ]; then
     INSTALL_DEVEL=1
+elif [ "$DEVEL" == "nightly" ]; then
+    INSTALL_NIGHTLY=1
+else
+    INSTALL_STABLE=1
 fi
 
 install_packages() {
@@ -48,7 +52,9 @@ create_questions() {
     echo "Creating questions..."
     if [ $INSTALL_DEVEL ] ; then 
         python3 /tmp/oginstall/oginstaller-v3.py devel
-    else
+    elif [ $INSTALL_NIGHTLY ] ; then 
+        python3 /tmp/oginstall/oginstaller-v3.py nightly
+    else 
         python3 /tmp/oginstall/oginstaller-v3.py
     fi
     deactivate