diff --git a/.github/workflows/ci_suite.yml b/.github/workflows/ci_suite.yml
index 264e306d44..840a78ae44 100644
--- a/.github/workflows/ci_suite.yml
+++ b/.github/workflows/ci_suite.yml
@@ -98,7 +98,7 @@ jobs:
         run: |
           bash tools/ci/install_byond.sh
           source $HOME/BYOND/byond/bin/byondsetup
-          tools/build/build -DCIDEFINE
+          tools/build/build -DCIBUILDING
           bash tools/ci/run_server.sh
         env:
           CBT_BUILD_MODE: TEST_RUN