diff --git a/.github/workflows/buildwin.yml b/.github/workflows/buildwin.yml
index f63cda0..41a449f 100644
--- a/.github/workflows/buildwin.yml
+++ b/.github/workflows/buildwin.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Build Makefile with CMake
         run: |
           Set-Location build
-          cmake -DCMAKE_CXX_FLAGS=-isystem\ include .. -G "MinGW Makefiles" -DCMAKE_SH="CMAKE_SH-NOTFOUND"
+          cmake -DCMAKE_CXX_FLAGS=-isystem\ build/include .. -G "MinGW Makefiles" -DCMAKE_SH="CMAKE_SH-NOTFOUND"
       - name: Build with Makefile
         run: mingw32-make -C build ComSquare
       - name: Copy shared libs