diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 734a858d737df680b25475b3f65f45b6e410ff07..6c7949f9f2f9ead8aec84512268b1f22064a8a6f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,13 +42,13 @@ dependencies:slc6-standalone:
   <<: *dependencies_template
   image: cern/slc6-base:latest
   variables:
-    CMAKE_EXTRA_FLAGS: -DCMAKE_USE_BUILTIN_EIGEN=TRUE
+    CMAKE_EXTRA_FLAGS: -DGEOMODEL_USE_BUILTIN_EIGEN=TRUE
 
 dependencies:centos7-standalone:
   <<: *dependencies_template
   image: cern/cc7-base:latest
   variables:
-    CMAKE_EXTRA_FLAGS: -DCMAKE_USE_BUILTIN_EIGEN=TRUE
+    CMAKE_EXTRA_FLAGS: -DGEOMODEL_USE_BUILTIN_EIGEN=TRUE
 
 # Build this project.
 .build_template: &build_template