diff --git a/.woodpecker.yml b/.woodpecker.yml
index e5870843..98024327 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -121,6 +121,8 @@ steps:
     image: docker.io/library/rust:1.86-slim-bookworm@sha256:57d415bbd61ce11e2d5f73de068103c7bd9f3188dc132c97cef4a8f62989e944
     environment:
       RUSTFLAGS: "-C link-arg=-fuse-ld=lld"
+      CARGO_TARGET_DIR: /tmp/t4-legacy-authority-target
+      CARGO_INCREMENTAL: "0"
     commands:
       - sh scripts/cluster-ci/install-legacy-authority-toolchain.sh
       - (cd .continuity/omp && bun install --frozen-lockfile)
diff --git a/scripts/cluster-ci/cluster-ci-contract.test.mjs b/scripts/cluster-ci/cluster-ci-contract.test.mjs
index 7efe4a1d..184cad23 100644
--- a/scripts/cluster-ci/cluster-ci-contract.test.mjs
+++ b/scripts/cluster-ci/cluster-ci-contract.test.mjs
@@ -279,6 +279,11 @@ test("Woodpecker keeps upstream gates and serializes bounded cluster publication
     steps["legacy-authority-build"].environment.RUSTFLAGS,
     "-C link-arg=-fuse-ld=lld",
   );
+  assert.equal(
+    steps["legacy-authority-build"].environment.CARGO_TARGET_DIR,
+    "/tmp/t4-legacy-authority-target",
+  );
+  assert.equal(steps["legacy-authority-build"].environment.CARGO_INCREMENTAL, "0");
   assert.match(legacyInstaller, /apt-get install[^\n]*\blld\b/u);
   assert.match(legacyInstaller, /command -v ld\.lld >\/dev\/null/u);
   assert.equal(
@@ -296,6 +301,7 @@ test("Woodpecker keeps upstream gates and serializes bounded cluster publication
     "(cd .continuity/omp && bun install --frozen-lockfile)",
     "(cd .continuity/omp && bun run build:native)",
   ]);
+  assert.deepEqual(steps["legacy-bridge-continuity"].depends_on, ["legacy-authority-build"]);
   assert.ok(steps["legacy-bridge-continuity"].commands.includes("pnpm test:legacy-bridge-continuity"));
   assert.equal(steps["legacy-bridge-continuity"].environment.T4_OMP_SOURCE_DIR, ".continuity/omp");
   assert.ok(