libxkbcommon 1.13.1 meson.build adds empty pkgconfig vars when xkeyboard-config is absent from the cross sysroot (XKEYBOARD_CONFIG_ROOT='') while has_extensions_directories is true -> meson hard-errors at pkgconfig.generate. Pass non-empty -Dxkb-config-(un)versioned-extensions-path.
Add restore-keys to all 4 depends cache restores: a busted exact key (any packages/* edit) now falls back to the newest prefix match, so make resumes from the partial built tree instead of rebuilding the static-Qt6 toolchain from scratch.
The find debug showed wayland-scanner.pc at <build_prefix>/lib/x86_64-linux-gnu/pkgconfig (multiarch layout), not lib/pkgconfig or share/pkgconfig. Add that path to the pkg-config vars so cross-meson finds the native scanner. Keeps native Wayland support (no disabling).
wayland-scanner.pc is a noarch .pc -> build_prefix/share/pkgconfig, not lib/pkgconfig, so the earlier PKG_CONFIG_PATH_FOR_BUILD missed it. Add share/pkgconfig to LIBDIR/PATH/PATH_FOR_BUILD + a find to log the real location.
Target wayland (-Dscanner=false) resolves the host scanner via dependency(..., native: true), which uses meson's BUILD-machine pkg-config — not pointed at build_prefix. Add PKG_CONFIG_PATH_FOR_BUILD=build_prefix + a [binaries] wayland-scanner in the cross-file. Fixes 'Dependency wayland-scanner not found' on aarch64/riscv64.
Cross-build wowlet via depends for aarch64/riscv64 (reusing the zeromq/ICU/qt/testlib fixes), embed the matching wownerod + depends-built tor, package an AppImage via contrib/AppImage/build-appimage.sh (its hardcoded /feather runtime path relativized to GITHUB_WORKSPACE). Cached per-host, save-always.
wowlet.exe reached 27% then hit 'zmq.h: No such file' — feather strips zeromq from depends (its wallet does not use zmq) but wownero cryptonote_core/net does. Port the wownero zeromq.mk + patch, register it in packages. Also switch the depends caches to restore + save(if:always) so the completed toolchain banks even when the wowlet build fails (auto post-save is skipped on job failure).
Cross qtdeclarative builds tools/qmltestrunner (QtQuickTest, needs testlib) and demands a matching HOST tool; the host's -no-feature-testlib left it without one, failing 'Configuring qtdeclarative' with 'Failed to find host tool Qt6::qmltestrunner'.
jwinterm