diff --git a/.github/workflows/benchmark-compare.yml b/.github/workflows/benchmark-compare.yml
index 38bf2917ed5a..b63c9ebfd8f1 100644
--- a/.github/workflows/benchmark-compare.yml
+++ b/.github/workflows/benchmark-compare.yml
@@ -36,6 +36,18 @@ jobs:
           # that the action was triggered by a team member.
           ref: ${{steps.comment-branch.outputs.head_sha}}
 
+      # We cannot use `angular/dev-infra/github-actions/npm/checkout-and-setup-node` here
+      # because it does not support checking out from a fork (as it lacks a `repository` input).
+      # Thus, we checkout and setup Node/pnpm manually.
+      - name: Install pnpm
+        uses: pnpm/action-setup@903f9c1a6ebcba6cf41d87230be49611ac97822e # v6.0.3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'pnpm'
+
       - run: pnpm install --frozen-lockfile
 
       - uses: angular/dev-infra/github-actions/bazel/configure-remote@442c2fcbf06a321b5196b4c5fc70e78a49242958
diff --git a/scripts/benchmarks/index.mts b/scripts/benchmarks/index.mts
index ae06736104dd..d84d05163d3b 100644
--- a/scripts/benchmarks/index.mts
+++ b/scripts/benchmarks/index.mts
@@ -171,14 +171,14 @@ async function runCompare(bazelTargetRaw: string | undefined, compareRef: string
     Log.log(green('Checking out comparison revision.'));
     git.run(['checkout', 'FETCH_HEAD']);
 
-    await exec('yarn');
+    await exec('pnpm', ['install', '--frozen-lockfile']);
     await runBenchmarkTarget(bazelTarget);
   } finally {
     restoreWorkingStage(git, currentRef);
   }
 
   // Re-install dependencies for `HEAD`.
-  await exec('yarn');
+  await exec('pnpm', ['install', '--frozen-lockfile']);
 
   const comparisonResults = await collectBenchmarkResults(testlogPath);