Made sure to clean build

.github/workflows/build_all.yml

@@ -283,7 +283,7 @@ jobs:
         - uses: actions/checkout@v2
 
         - name: Create Build Environment
-          run: cmake -E make_directory ${{runner.workspace}}/build
+          run: rm -rf ${{runner.workspace}}/build && cmake -E make_directory ${{runner.workspace}}/build
         
         - name: Prepare CMake
           working-directory: ${{runner.workspace}}/build