From 074f4bbe4f7062789197653e0172b5525c31147b Mon Sep 17 00:00:00 2001
From: Alex Kempton <alex@funwithtriangles.net>
Date: Thu, 5 Dec 2024 16:01:25 +0100
Subject: [PATCH] potential gh actions fix

---
 .github/workflows/pr-checks.yml | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 6e3a0a8e..6f0c7427 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -19,8 +19,21 @@ jobs:
         with:
           node-version: '20'
 
+      - name: Install Yarn
+        run: corepack enable && corepack prepare yarn@4.5.3 --activate # Specify the Yarn version you're using
+
+      - name: Cache Yarn dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            .yarn/cache
+            node_modules
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
       - name: Install dependencies
-        run: yarn
+        run: yarn install --immutable --check-cache # Immutable mode to ensure lock file consistency
 
       - name: Run TypeScript, ESLint, and Prettier checks
         run: |