diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 86a3c5b8b38305486bdc1cb6da5921a9f6726ae1..6ffbee41ad2e0cc6dbb836fb0fb17275ced7f503 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -364,7 +364,6 @@ ubu-gm-base-builtin:
   stage: step-A
   variables:
     CMAKE_ARGS: ${CMAKE_BASE_ARGS}
-    CMAKE_EXTRA_FLAGS: -DGEOMODEL_USE_BUILTIN_JSON=TRUE -DGEOMODEL_USE_BUILTIN_XERCESC=TRUE
 
 ubu-gm-tools-builtin:
   <<: *ubuntu-job
@@ -497,7 +496,6 @@ cc7-gm-base-builtin:
   stage: step-A
   variables:
     CMAKE_ARGS: ${CMAKE_BASE_ARGS}
-    CMAKE_EXTRA_FLAGS: -DGEOMODEL_USE_BUILTIN_JSON=TRUE -DGEOMODEL_USE_BUILTIN_XERCESC=TRUE
 
 cc7-gm-tools-builtin:
   <<: *cc7-job