diff --git a/.gitignore b/.gitignore
index 32c9bf88d..c95a4cd30 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,6 +32,7 @@ cache
 *.lock
 *.zip
 *.rar
+*.7z
 *.pyc
 /*.bat
 /*.sh
diff --git a/installer.py b/installer.py
index 8b571d02d..c36382ded 100644
--- a/installer.py
+++ b/installer.py
@@ -603,7 +603,7 @@ def list_extensions_folder(folder, quiet=False):
     if disabled_extensions_all != 'none':
         return []
     disabled_extensions = opts.get('disabled_extensions', [])
-    enabled_extensions = [x for x in os.listdir(folder) if x not in disabled_extensions and not x.startswith('.')]
+    enabled_extensions = [x for x in os.listdir(folder) if os.path.isdir(os.path.join(folder, x)) and x not in disabled_extensions and not x.startswith('.')]
     if not quiet:
         log.info(f'Extensions: enabled={enabled_extensions} {name}')
     return enabled_extensions