diff --git a/index/ge/geste.toml b/index/ge/geste.toml
index 317dbb32..1be4cf64 100644
--- a/index/ge/geste.toml
+++ b/index/ge/geste.toml
@@ -59,6 +59,7 @@ pixel.
 """
 
 project-files = ["geste.gpr"]
+auto-gpr-with=false # geste.gpr has to be extended
 
 licenses = ["BSD 3-Clauses"]
 
diff --git a/index/lv/lvgl_ada.toml b/index/lv/lvgl_ada.toml
index a714470c..532ad5e0 100644
--- a/index/lv/lvgl_ada.toml
+++ b/index/lv/lvgl_ada.toml
@@ -9,6 +9,7 @@ project-files = ["lvgl_ada_1bit_color.gpr",
                  "lvgl_ada_8bit_color.gpr",
                  "lvgl_ada_16bit_color.gpr",
                  "lvgl_ada_32bit_color.gpr"]
+auto-gpr-with=false # only one project file should be used and extended
 
 ["0.1.0"]
 origin = "https://github.com/Fabien-Chouteau/lvgl-ada/releases/download/v0.1.0/lvgl_ada-0.1.0.zip"