diff --git a/.github/workflows/build_all.yml b/.github/workflows/build_all.yml
index c8067a0..e92eb47 100644
--- a/.github/workflows/build_all.yml
+++ b/.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