diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bdfb959c..878e5e6f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -163,8 +163,8 @@ jobs:
             -DISLE_USE_DX5=${{ !!matrix.dx5 }} \
             -DISLE_BUILD_CONFIG=${{ !!matrix.config }} \
             -DUSE_SDL2=${{ !!matrix.use_sdl2 }} \
-            -DCMAKE_POSITION_INDEPENDENT_CODE=${{ matrix.fpic || 'ON' }} \
-            -DISLE_EXTENSIONS=${{ matrix.extensions || 'ON' }} \
+            -DCMAKE_POSITION_INDEPENDENT_CODE=${{ !!matrix.fpic || 'ON' }} \
+            -DISLE_EXTENSIONS=${{ !!matrix.extensions || 'ON' }} \
             -DISLE_BUILD_ASSETS=${{ !!matrix.build-assets }} \
             -DENABLE_CLANG_TIDY=${{ !!matrix.clang-tidy  }} \
             -DISLE_WERROR=${{ !!matrix.werror }} \