diff --git a/build.sh b/build.sh
index 129a197..2bffe47 100755
--- a/build.sh
+++ b/build.sh
@@ -158,7 +158,7 @@ main() {
 
     export DWQ_ENV="-E APPS -E BOARDS -E NIGHTLY -E STATIC_TESTS -E RUN_TESTS \
                     -E CI_MURDOCK_PROJECT -E ENABLE_TEST_CACHE -E CI_FAST_FAIL \
-                    -E FULL_BUILD"
+                    -E FULL_BUILD -ECI_BUILD_BRANCH"
 
     local repo_dir="RIOT"
     if [ -n "${CI_BUILD_COMMIT}" ]; then