diff --git a/.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml b/.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml
index e2f64715f8..fbd63988dc 100644
--- a/.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml
+++ b/.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml
@@ -63,40 +63,20 @@ steps:
   id: prepare-golden
   waitFor: ["-"]
 
-#- name: ubuntu:24.04
-#  entrypoint: bash
-#  args:
-#  - "-c"
-#  - |
-#    # Install docker
-#    apt update
-#    apt install -y ca-certificates curl gnupg lsb-release
-#    mkdir -p /etc/apt/keyrings
-#    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \
-#       gpg --dearmor -o /etc/apt/keyrings/docker.gpg
-#    echo \
-#       "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
-#       $(lsb_release -cs) stable" | \
-#       tee /etc/apt/sources.list.d/docker.list > /dev/null
-#    apt update
-#    apt -y install \
-#       docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
-#    docker run \
-#      --rm \
-#      --quiet \
-#      -u "$(id -u):$(id -g)" \
-#      -v "/workspace/google-cloud-java:/workspace" \
-#      -v "/workspace/hermetic_build/library_generation/tests/resources/integration/google-cloud-java:/workspace/config" \
-#      -v "/workspace/googleapis:/workspace/apis" \
-#      "${_TEST_IMAGE}" \
-#      --generation-config-path="/workspace/config/generation_config.yaml" \
-#      --api-definitions-path="/workspace/apis"
-#  id: generate-libraries
-#  waitFor: [
-#    "build-image",
-#    "download-api-definitions",
-#    "prepare-golden"
-#  ]
+- name: ubuntu:24.04
+  entrypoint: bash
+  args:
+  - "-c"
+  - |
+    apt update && apt install -y maven
+    mvn dependency:copy \
+      -B -ntp \
+      -Dartifact=com.google.api:gapic-generator-java:2.38.1 \
+      -DoutputDirectory=/workspace
+    cd /workspace
+    mv gapic-generator-java-2.38.1.jar gapic-generator-java.jar
+  id: prepare-generator-jar
+  waitFor: [ "-" ]
 
 - name: gcr.io/cloud-builders/docker
   args: [
@@ -105,6 +85,9 @@ steps:
     "-v", "/workspace/google-cloud-java:/workspace",
     "-v", "/workspace/hermetic_build/library_generation/tests/resources/integration/google-cloud-java:/workspace/config",
     "-v", "/workspace/googleapis:/workspace/apis",
+    # Fix gapic-generator-java so that the generation result stays
+    # the same.
+    "-v", "/workspace/gapic-generator-java.jar:/home/.library_generation/gapic-generator-java.jar",
     "${_TEST_IMAGE}",
     "--generation-config-path=/workspace/config/generation_config.yaml",
     "--api-definitions-path=/workspace/apis"
@@ -115,7 +98,8 @@ steps:
   waitFor: [
     "build-image",
     "download-api-definitions",
-    "prepare-golden"
+    "prepare-golden",
+    "prepare-generator-jar"
   ]
 
 - name: ubuntu:24.04