Fix ci failures.

Author: andrewsanchez

.github/actions/setup-anki/action.yml

@@ -49,25 +49,29 @@ runs:
     - name: Install rsync (Windows)
       if: runner.os == 'Windows'
       shell: bash
-      run: choco install rsync -y
+      run: |
+        /c/msys64/usr/bin/pacman.exe -Sy --noconfirm rsync
+        echo "C:\msys64\usr\bin" >> "$GITHUB_PATH"
 
+    # Reads toolchain version from rust-toolchain.toml automatically.
     - name: Install Rust toolchain
-      uses: dtolnay/rust-toolchain@stable
+      uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
-        toolchain: "1.92.0"
         components: clippy
+        cache: false # ci.yml manages its own cargo cache
 
-    # Install uv via setup-uv and point the build system at it via UV_BINARY so it skips downloading its own copy.
-    - name: Install uv (Linux)
-      if: runner.os == 'Linux'
+    # Install uv via setup-uv and point the build system at it via UV_BINARY
+    # so it skips downloading its own copy (see build/ninja_gen/src/python.rs).
+    - name: Install uv
+      id: setup-uv
       uses: astral-sh/setup-uv@v7
       with:
         enable-cache: true
+        prune-cache: ${{ runner.os != 'Windows' }} # Windows file-locking breaks cache pruning
 
     - name: Set UV_BINARY
-      if: runner.os == 'Linux'
       shell: bash
-      run: echo "UV_BINARY=$(which uv)" >> "$GITHUB_ENV"
+      run: echo "UV_BINARY=${{ steps.setup-uv.outputs.uv-path }}" >> "$GITHUB_ENV"
 
     - name: Install n2
       shell: bash