Indeed. We have some Python modules written in Rust. It needs Rust nightly, because pyo3 requires Rust nightly. The Rust crate relies on libtensorflow. Unit tests for the Python module use Python and pytest. And we use our own build of libtensorflow (optimizations for AVX and FMA).

The dependencies of such projects are easy to specify in Nix. Moreover, it's easy to reproduce the environment across machines by pinning nixpkgs to a specific version.