use yarn1

.github/workflows/build-monorepo-action.yml

@@ -32,21 +32,19 @@ jobs:
 
       - name: Enable corepack
         run: corepack enable
-
-      - name: Set Yarn1
-        run: corepack prepare yarn@1.22.19
-
       - name: Setup monorepo
         working-directory: monorepo
-        run: |
-          echo '{"name":"rnos-monorepo-tester","version":"1.0.0","license":"MIT","private":true,"workspaces":{"packages":["RootApp","packages/PackageApp", "AppA", "AppB"],"nohoist":["**/react","**/react-dom","**/react-native","**/react-native/**","**/react-native-codegen","**/react-native-dev-menu"]}}' > package.json
-          yarn
+        run: echo '{"name":"rnos-monorepo-tester","version":"1.0.0","license":"MIT","private":true,"workspaces":{"packages":["RootApp","packages/PackageApp", "AppA", "AppB"],"nohoist":["**/react","**/react-dom","**/react-native","**/react-native/**","**/react-native-codegen","**/react-native-dev-menu"]}}' > package.json
+      - name: Set Yarn1
+        run: yarn set version yarn@1.22.19
+      - name: Install dependencies
+        run: yarn install
       - name: Create RootApp
         working-directory: monorepo
-        run: npx react-native init RootApp --skip-install --version 0.73
+        run: npx react-native@0.73 init RootApp --skip-install --version 0.73
       - name: Create PackageApp
         working-directory: monorepo/packages
-        run: npx react-native init PackageApp --skip-install --version 0.73
+        run: npx react-native@0.73 init PackageApp --skip-install --version 0.73
 
       - name: Install dependencies for RootApp
         working-directory: monorepo/RootApp