ci: only trigger NUR update once

.github/workflows/build.yml

@@ -64,7 +64,11 @@ jobs:
       matrix: ${{ fromJson(needs.define-matrix.outputs.matrix) }}
     name: ${{ matrix.displayRunner }} - ${{ matrix.nixpkgs }} - ${{ matrix.subset }}
     runs-on: ${{ matrix.runner }}
+    outputs:
+      nurRepo: ${{ steps.build.outputs.nurRepo }}
     steps:
+    - name: Output nurRepo for final job
+      run: echo 'nurRepo=${{ matrix.nurRepo }}' >> "$GITHUB_OUTPUT"
     - name: Checkout repository
       uses: actions/checkout@v4
     - name: Install qemu-user-static
@@ -98,6 +102,7 @@ jobs:
           -I nixpkgs=$(nix-instantiate --find-file nixpkgs) \
           -I $PWD
     - name: Build nix packages
+      id: build
       # run: nix shell -f '<nixpkgs>' nix-build-uncached -c nix-build-uncached ci.nix -A cacheOutputs
       run: nix shell -f '.' nix-build-uncached-logging -c nix-build-uncached ci.nix --keep-going ${{ matrix.qemuSystem && format('--argstr platform {0}', matrix.qemuSystem) }} --argstr subsetName ${{ matrix.subset }} -A cacheOutputs
     # - name: Upload debug info
@@ -108,7 +113,12 @@ jobs:
     #     path: |
     #       /nix/store/*fcntlPathTest*.drv
     #     if-no-files-found: ignore
+  trigger-update:
+    name: Trigger NUR update
+    runs-on: ubuntu-latest
+    needs: tests
+    steps:
     - name: Trigger NUR update
       # Don't replace <YOUR_REPO_NAME> here!
-      if: ${{ matrix.nurRepo != '<YOUR_REPO_NAME>' }}
-      run: curl -XPOST "https://nur-update.nix-community.org/update?repo=${{ matrix.nurRepo }}"
+      if: ${{ needs.tests.outputs.nurRepo != '<YOUR_REPO_NAME>' }}
+      run: curl -XPOST "https://nur-update.nix-community.org/update?repo=${{ needs.tests.outputs.nurRepo }}"