ci: debug output of nix build

Signed-off-by: Paul Kroeher <paul.kroeher@cyberus-technology.de>

On-behalf-of: SAP paul.kroeher@sap.com

Author: pkr4711

.github/workflows/qa.yml

@@ -16,9 +16,9 @@ jobs:
       - uses: cachix/install-nix-action@v30
       - name: Basic setup
         run: |
-          nix build .#tests.x86_64-linux.openstack-default-setup.driver
+          nix build -Lv .#tests.x86_64-linux.openstack-default-setup.driver
           ./result/bin/nixos-test-driver
       - name: Live migration
         run: |
-          nix build .#tests.x86_64-linux.openstack-live-migration.driver
+          nix build -Lv .#tests.x86_64-linux.openstack-live-migration.driver
           ./result/bin/nixos-test-driver