Use latest nightly for QEMU builds too.

Author: thejpster

.github/workflows/build.yml

@@ -291,6 +291,11 @@ jobs:
       - name: Install custom QEMU into /opt
         run: |
           curl -sSL https://github.com/jonathanpallant/qemu9-for-ubuntu-2404/releases/download/qemu-9.2.3%2Bbuild0/qemu-9.2.3-ubuntu-24.04.tar.gz | sudo tar xvzf - -C /
+      - name: Install Rust
+        run: |
+          rustup install nightly-2026-01-25
+          rustup component add rust-src --toolchain nightly-2026-01-25
+          rustup default nightly-2026-01-25
       - name: Run tests in QEMU
         run: |
           export PATH=/opt/qemu/bin:$PATH