README: fix uhyve installation instructions
@@ -108,7 +108,7 @@ RustyHermit can run within our own hypervisor [*uhyve*](https://github.com/hermi
Please install the hypervisor as follows:
```sh
-cargo install uhyve
+cargo +nightly install uhyve --locked
```
Afterwards, your are able to start RustyHermit applications within our hypervisor:
