| ## External programs as inputs and dependencies to custom targets | |
| Custom targets now allow specifying an external program in | |
| the `input` and `depends` keyword arguments. This also applies | |
| to several methods provided by modules, as they are lowered to | |
| custom targets internally. | |
| ## External programs as dependencies to tests | |
| Tests now allow specifying an external program in | |
| the `depends` keyword argument. | |