···

       
7
       
7
       
 
       
  # Always defined, but the value depends on the presence of an option.

     

       
8
       
8
       
 
       
  config = {

     

       
9
       
9
       
 
       
    value = if options ? enable then 360 else 7;

     

       
10
       
10
       
-
       
  } 

     

       
10
       
10
       
+
       
  }

     

       
11
       
11
       
 
       
  # Only define if possible.

     

       
12
       
12
       
 
       
  // lib.optionalAttrs (options ? enable) {

     

       
13
       
13
       
 
       
    enable = true;