diff --git a/custom/modules/secrets-store.nix b/custom/modules/secrets-store.nix
index 0081573..f94adf9 100644
--- a/custom/modules/secrets-store.nix
+++ b/custom/modules/secrets-store.nix
@@ -11,6 +11,11 @@ let
       options = secretOptions;
     });
 
+  # Like types.path but also must exists
+  validFile = with types; path // {
+    check = x: path.check x && builtins.pathExists x;
+  };
+
   # Secret file definition
   secretOptions =
     { user = mkOption
@@ -29,7 +34,7 @@ let
           description = "File permission (octal format)";
         };
       path = mkOption
-        { type = types.nullOr types.path;
+        { type = types.nullOr validFile;
           default = null;
           apply = toString;
           description = "File to include in the secret store";