sdl12-compat: CI: fix (?) working directory on build?

From 6c2b8a1c2efec63f8a2f82fe8f4c07e2bb70b468 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Tue, 1 Jun 2021 18:29:52 -0400
Subject: [PATCH] CI: fix (?) working directory on build?

---
 .github/workflows/main.yml | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3ed79b9..903e9fc 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -24,16 +24,11 @@ jobs:
         repository: libsdl-org/SDL
         ref: release-2.0.14
         path: SDL2
-    - name: Sanity check SDL2 headers 1
-      run: ls -l "${{ github.workspace }}"
-    - name: Sanity check SDL2 headers 2
-      run: ls -l "${{ github.workspace }}/SDL2"
-    - name: Sanity check SDL2 headers 3
-      run: ls -l "${{ github.workspace }}/SDL2/include"
     - name: Get sdl12-compat sources
       uses: actions/checkout@v2
     - name: Configure CMake
       run: cmake -DSDL2_INCLUDE_DIR="${{ github.workspace }}/SDL2/include" -B build ${{ matrix.platform.flags }}
     - name: Build
-      run: cmake --build build/
+      working-directory: .build
+      run: cmake --build .