diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index c271424a..0be97dc2 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -92,7 +92,7 @@ jobs:
                 -DCMAKE_INSTALL_PREFIX=C:\tools\miniconda3\Library ^
                 -DDCGP_BUILD_DCGP=no ^
                 -DDCGP_BUILD_DCGPY=yes ^
-                -DCMAKE_CXX_FLAGS_RELEASE="-D_copysign=copysign"
+                -DDCGP_CXX_FLAGS_EXTRA="-D_copysign=copysign"
           cmake --build . -- -v
           cmake --build . --target install
           python -c "import dcgpy.test; dcgpy.test.run_test_suite()"
diff --git a/dcgpy/CMakeLists.txt b/dcgpy/CMakeLists.txt
index 3b0b90e7..6ee9d016 100644
--- a/dcgpy/CMakeLists.txt
+++ b/dcgpy/CMakeLists.txt
@@ -39,6 +39,11 @@ target_link_libraries(dcgpy INTERFACE ${DCGPY_BP_TARGET} Boost::disable_autolink
 target_include_directories(dcgpy INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../>
 $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include/dcgpy> $<INSTALL_INTERFACE:include>)
 
+# Extra flags to be appended in CI experiments
+set(DCGP_CXX_FLAGS_EXTRA)
+mark_as_advanced(DCGP_CXX_FLAGS_EXTRA)
+list(APPEND DCGP_CXX_FLAGS_RELEASE ${DCGP_CXX_FLAGS_EXTRA})
+
 # Setup of the dcgpy core module.
 YACMA_PYTHON_MODULE(core 
     core.cpp