book/src/getting-started/deferred-targets.md
The following targets are tracked in the project backlog but are not currently supported. Builds for these targets may fail or produce incorrect output.
aarch64 Linux — the build is currently broken on 64-bit ARM Linux. Tracked in issue #227.
Cross-compile Linux → Windows (debug mode) — cross-compilation from Linux to Windows targets fails in debug mode. Tracked in issue #181.
NixOS X11 — building under NixOS with the X11 back end requires extra pkgs configuration not yet covered by the official build instructions. Tracked in PR #289 and issue #288. This target is part of the WS6 platform matrix.
software_renderer on wasm32-unknown-emscripten — the CPU-only headless renderer (PLATFORM=Memory / rlsw) is incompatible with the WebAssembly target. Tracked as a deferred item in docs/superpowers/notes/ws6b-complete.md (item 5).
These are tracked in the project backlog; community PRs welcome.