diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index fabaab1b710..439a0d3fe2c 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -83,7 +83,11 @@ jobs:
           cache: pnpm
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: |
+          pnpm install --frozen-lockfile || {
+            echo "Frozen lockfile install failed; retrying without frozen lockfile because PRs do not commit pnpm-lock.yaml."
+            pnpm install --no-frozen-lockfile
+          }
 
       - name: Typecheck workspaces whose build scripts skip TypeScript
         run: pnpm run typecheck:build-gaps
@@ -135,7 +139,11 @@ jobs:
           cache: pnpm
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: |
+          pnpm install --frozen-lockfile || {
+            echo "Frozen lockfile install failed; retrying without frozen lockfile because PRs do not commit pnpm-lock.yaml."
+            pnpm install --no-frozen-lockfile
+          }
 
       - name: Run serialized server test shard
         run: pnpm test:run:serialized -- --shard-index ${{ matrix.shard_index }} --shard-count ${{ matrix.shard_count }}
@@ -162,7 +170,11 @@ jobs:
           cache: pnpm
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: |
+          pnpm install --frozen-lockfile || {
+            echo "Frozen lockfile install failed; retrying without frozen lockfile because PRs do not commit pnpm-lock.yaml."
+            pnpm install --no-frozen-lockfile
+          }
 
       # `release.sh` always executes its Step 2/7 workspace build, even when
       # `--skip-verify` bypasses the initial verification gate.
@@ -193,7 +205,11 @@ jobs:
           cache: pnpm
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: |
+          pnpm install --frozen-lockfile || {
+            echo "Frozen lockfile install failed; retrying without frozen lockfile because PRs do not commit pnpm-lock.yaml."
+            pnpm install --no-frozen-lockfile
+          }
 
       - name: Install Playwright
         run: npx playwright install --with-deps chromium