diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index f740d5c..0bdac4f 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   nix-build:
-    runs-on: build-server
+    runs-on: runner-ct
     steps:
       # actions/checkout@v4 is unreliable on host-mode runners (its files are
       # copied into the workspace instead of the repo), so clone explicitly.