diff --git a/packaging_v2/convert_app_to_packaging_v2.py b/packaging_v2/convert_app_to_packaging_v2.py
index 21fe774..b2a11c3 100644
--- a/packaging_v2/convert_app_to_packaging_v2.py
+++ b/packaging_v2/convert_app_to_packaging_v2.py
@@ -101,8 +101,8 @@ def _convert_v1_manifest_to_v2(app_path):
                 manifest["resources"]["ports"][f"{name}.exposed"] = exposed
 
     maybequote = "[\"'\"'\"']?"
-    apt_dependencies = check_output(f"sed -nr 's/.*_dependencies={maybequote}(.*){maybequote}? *$/\\1/p' '{app_path}/scripts/_common.sh' | tr -d '\"' | sed 's@ @\\n@g'")
-    php_version = check_output(f"sed -nr 's/^ *YNH_PHP_VERSION={maybequote}(.*){maybequote}?$/\\1/p' '{app_path}/scripts/_common.sh' | tr -d \"\\\"'\"")
+    apt_dependencies = check_output(f"sed -nr 's/.*_dependencies={maybequote}(.*){maybequote}? *$/\\1/p' '{app_path}/scripts/_common.sh' 2>/dev/null | tr -d '\"' | sed 's@ @\\n@g'")
+    php_version = check_output(f"sed -nr 's/^ *YNH_PHP_VERSION={maybequote}(.*){maybequote}?$/\\1/p' '{app_path}/scripts/_common.sh' 2>/dev/null | tr -d \"\\\"'\"")
     if apt_dependencies.strip():
         if php_version:
             apt_dependencies = apt_dependencies.replace("${YNH_PHP_VERSION}", php_version)
@@ -283,6 +283,9 @@ def cleanup_scripts_and_conf(folder):
 
         script = f"{folder}/scripts/{s}"
 
+        if not os.path.exists(script):
+            continue
+
         content = open(script).read()
 
         for pattern in patterns_to_remove_in_scripts: