Building ashpd fails: could not find zvariant

[FireFragment]

When building the ashpd crate with crate2nix, build fails with many errors similar to this one:

error[E0433]: failed to resolve: could not find `zvariant` in the list of imported crates
  --> src/desktop/account.rs:30:10
   |
30 | #[derive(SerializeDict, Type, Debug, Default)]
   |          ^^^^^^^^^^^^^ could not find `zvariant` in the list of imported crates
   |
   = note: this error originates in the derive macro `SerializeDict` (in Nightly builds, run with -Z macro-backtrace for more info)

I've created repo with minimal reproducible example here: https://github.com/FireFragment/crate2nix-bug-ashpd

To reproduce

Just run this command:

nix build github:FireFragment/crate2nix-bug-ashpd