I stumbled upon the very experimental nix-ninja [0] recently. They seem to create a dynamic nix derivation per compilation unit, which would be very similar to

I stumbled upon the very experimental nix-ninja [0] recently. They seem to create a dynamic nix derivation per compilation unit, which would be very similar to what you describe as manifests in your post as it also creates a hash of all inputs. Would be interesting to here your opinion on that approach [0]: https://github.com/pdtpartners/nix-ninja https://github.com/pdtpartners/nix-ninja