don't skip the "build platform" job even when no platforms to build

.github/workflows/build.yaml

@@ -34,23 +34,24 @@ jobs:
   build-platforms:
     name: Build Platforms
     needs: d
-    if: needs.d.outputs.missing-platforms != '[]'
     strategy:
       fail-fast: false
       matrix:
-        platform: ${{fromJSON(needs.d.outputs.missing-platforms)}}
-    runs-on: ["self-hosted", "enf-x86-beefy"]
+        platform: ${{ needs.d.outputs.missing-platforms == '[]' && fromJSON('["none"]') || fromJSON(needs.d.outputs.missing-platforms) }}
+    runs-on: ${{ matrix.platform == 'none' && 'ubuntu-latest' || fromJSON('["self-hosted", "enf-x86-beefy"]') }}
     permissions:
       packages: write
       contents: read
     steps:
       - name: Login to Container Registry
+        if: matrix.platform != 'none'
         uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{github.repository_owner}}
           password: ${{secrets.GITHUB_TOKEN}}
       - name: Build and push
+        if: matrix.platform != 'none'
         uses: docker/build-push-action@v3
         with:
           push: true
@@ -59,7 +60,6 @@ jobs:
 
   Build:
     needs: [d, build-platforms]
-    if: always() && needs.d.result == 'success' && (needs.build-platforms.result == 'success' || needs.build-platforms.result == 'skipped')
     strategy:
       fail-fast: false
       matrix:
@@ -89,7 +89,6 @@ jobs:
   dev-package:
     name: Build leap-dev package
     needs: [d, Build]
-    if: always() && needs.Build.result == 'success'
     runs-on: ubuntu-latest
     container: ${{fromJSON(needs.d.outputs.p)['ubuntu20'].image}}
     steps:
@@ -114,7 +113,6 @@ jobs:
   tests:
     name: Tests
     needs: [d, Build]
-    if: always() && needs.Build.result == 'success'
     strategy:
       fail-fast: false
       matrix:
@@ -141,7 +139,6 @@ jobs:
   np-tests:
     name: NP Tests
     needs: [d, Build]
-    if: always() && needs.Build.result == 'success'
     strategy:
       fail-fast: false
       matrix:
@@ -170,7 +167,6 @@ jobs:
   lr-tests:
     name: LR Tests
     needs: [d, Build]
-    if: always() && needs.Build.result == 'success'
     strategy:
       fail-fast: false
       matrix: