diff --git a/data/helpers.d/utils b/data/helpers.d/utils
index f5dd76e92..c216aa6d2 100644
--- a/data/helpers.d/utils
+++ b/data/helpers.d/utils
@@ -201,6 +201,7 @@ ynh_setup_source () {
         else
             unzip -quo $src_filename -d "$dest_dir"
         fi
+        ynh_secure_remove --file="$src_filename"
     else
         local strip=""
         if [ "$src_in_subdir" != "false" ]
@@ -219,6 +220,7 @@ ynh_setup_source () {
         else
             ynh_die --message="Archive format unrecognized."
         fi
+        ynh_secure_remove --file="$src_filename"
     fi
 
     # Apply patches
diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 08e13e9f2..301d37398 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -3605,7 +3605,11 @@ def _patch_legacy_helpers(app_folder):
         if not os.path.isfile(filename):
             continue
 
-        content = read_file(filename)
+        try:
+            content = read_file(filename)
+        except MoulinetteError:
+            continue
+        
         replaced_stuff = False
         show_warning = False