diff --git a/.github/workflows/ci-cd-web-desktop.yml b/.github/workflows/ci-cd-web-desktop.yml
index 1ade63c..9e6df90 100644
--- a/.github/workflows/ci-cd-web-desktop.yml
+++ b/.github/workflows/ci-cd-web-desktop.yml
@@ -149,6 +149,14 @@ jobs:
             cp -f "$DEFAULT_DIR/.env" "$EFFECTIVE_APP_DIR/.env"
           fi
 
+      - name: Prune workspace for server-only build
+        run: |
+          cd "$EFFECTIVE_APP_DIR"
+          # Keep only root (web) as a package in this effective workspace
+          printf "packages:\n  - .\n\nignoredBuiltDependencies:\n  - '@prisma/client'\n  - '@prisma/engines'\n  - '@tailwindcss/oxide'\n  - esbuild\n  - prisma\n  - sharp\n  - unrs-resolver\n" > pnpm-workspace.yaml
+          # Remove desktop app to avoid pnpm touching its node_modules on this runner
+          rm -rf apps/desktop || true
+
       - name: Clean Next.js cache (.next) to avoid EACCES
         run: |
           cd "$EFFECTIVE_APP_DIR"