try installing

Author: wolfv

.github/workflows/ci.yml

@@ -46,12 +46,15 @@ jobs:
           mkdir build
           cd build
           cmake -GNinja .. ^
+            -D CMAKE_INSTALL_PREFIX=%CONDA_PREFIX%\Library ^
             -D ENABLE_CONDA=ON ^
             -D MULTI_SEMANTICS=ON ^
             -D WITHOUT_COOKIEOPEN=ON
 
           ninja
 
+          ninja install
+
       - name: Test
         shell: cmd /C call {0}
         run: |