diff --git a/m/hut/gitlab-runner.nix b/m/hut/gitlab-runner.nix
index b320f547..c941e1de 100644
--- a/m/hut/gitlab-runner.nix
+++ b/m/hut/gitlab-runner.nix
@@ -57,6 +57,10 @@
           "hut:10.0.40.7"
         ];
         dockerDisableCache = true;
+        registrationFlags = [
+          # Increase build log length to 64 MiB
+          "--output-limit 65536"
+        ];
         preBuildScript = pkgs.writeScript "setup-container" ''
           mkdir -p -m 0755 /nix/var/log/nix/drvs
           mkdir -p -m 0755 /nix/var/nix/gcroots