diff --git a/gitlab-ci/build.sh b/gitlab-ci/build.sh
index 76b05d479c4f5fb36ccad2d32c1a75f2dbbc159e..aa28e04529d1d060acd34c39d4e6a38cbec959aa 100755
--- a/gitlab-ci/build.sh
+++ b/gitlab-ci/build.sh
@@ -2,4 +2,4 @@
 set -e
 echo "build stage"
 pwd
-make
+make CFLAGS='-DBBF_VENDOR_PREFIX=\"X_IOPSYS_EU_\"'