Path in error is not correctly normalized

I can't link to the full output, however I am running into the following issue:

- The expected output contains:

```
--> $CARGO/serde_json-1.0.117/src/ser.rs
```

The actual output is then:
```
--> /nix/store/kjdanc03w7gsxq3fzi1bf19h6gk47ypc-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/serde_json-1.0.117/src/ser.rs:2209:17
```

I am running on 1.0.96.