Disable certain packages.

.gitlab-ci.yml

@@ -21,6 +21,8 @@ debian-10-gcc-8-17:
     DUNECI_TEST_LABELS: ""
     DUNECI_TOOLCHAIN: gcc-7-17
     DUNE_TEST_EXPECTED_VC_IMPLEMENTATION: AVX
+    CMAKE_DISABLE_FIND_PACKAGE_Vc: TRUE
+    CMAKE_DISABLE_FIND_PACKAGE_Alberta: TRUE
 
 ubuntu:18.04--gcc:
   image: duneci/ubuntu:18.04