unison/unison-src/transcripts/fix4556.md

```ucm:hide
scratch/main> builtins.merge
```

```unison
thing = 3
foo.hello = 5 + thing
bar.hello = 5 + thing
hey = foo.hello
```

```ucm
scratch/main> add
```

```unison
thing = 2
```

```ucm
scratch/main> update
```