···

       
16
       
16
       
 
       
pkgs.foo.override { arg1 = val1; arg2 = val2; ... }

     

       
17
       
17
       
 
       
```

     

       
18
       
18
       
 
       


     

       
19
       
19
       
+
       
It's also possible to access the previous arguments.

     

       
20
       
20
       
+
       


     

       
21
       
21
       
+
       
```nix

     

       
22
       
22
       
+
       
pkgs.foo.override (previous: { arg1 = previous.arg1; ... })

     

       
23
       
23
       
+
       
```

     

       
24
       
24
       
+
       


     

       
19
       
25
       
 
       
<!-- TODO: move below programlisting to a new section about extending and overlays and reference it -->

     

       
20
       
26
       
 
       


     

       
21
       
27
       
 
       
```nix