Library recipes do not live in Wawona/dependencies/libs/. Substrate is wwn-toolchain. GLES/Vulkan ICDs are wwn-iland. Wawona merges registries upward.

Layer 3  App packaging (xcodegen, Gradle, AppImage)
Layer 2  Rust backend (crate2nix)
Layer 1  Native libs from wwn-* flake inputs

Inputs: see Repo DAG. follows keep the graph acyclic.

macOS waypipe is a real backend (IOSurface/Mach). Do not document it as missing.

Binary cache: org FlakeHub cache after determinate-nixd login.