diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67fb11f..29c278a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,10 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [1.5.1.1] - 2024-03-29
+
+Minor fixes to allow linking against QuantLib-Risks without duplicate symbols.
+
 ## [1.5.1] - 2024-03-28
 
 Initial release of Python bindings for XAD.
 
 
+[1.5.1.1]: https://github.com/auto-differentiation/xad-py/compare/v1.5.1...v1.5.1.1
 
 [1.5.1]: https://github.com/auto-differentiation/xad-py/releases/tag/v1.5.1
diff --git a/pyproject.toml b/pyproject.toml
index 607eecb..433e62d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@
 
 [tool.poetry]
 name = "xad"
-version = "1.5.1"
+version = "1.5.1.1"
 description = "High-Performance Automatic Differentiation for Python"
 authors = ["Auto Differentiation Dev Team <dev@auto-differentiation.com>"]
 readme = "README.md"
@@ -102,6 +102,10 @@ requires = [
 ]
 build-backend = "poetry.core.masonry.api"
 
+[tool.pytest.ini_options]
+minversion = "6.0"
+testpaths = ["tests"]
+
 [tool.black]
 line-length = 100
 target-version = ["py38", "py39", "py310", "py311", "py312"]
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 835752c..10f698d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -26,16 +26,47 @@ if(MSVC)
   option(XAD_STATIC_MSVC_RUNTIME "Use static runtime" ON)
 endif()
 
+find_package(Threads REQUIRED)
+
 add_subdirectory(pybind11)
 add_subdirectory(xad)
 
-pybind11_add_module(_xad module.cpp math.hpp tape.hpp real.hpp exceptions.hpp)
-target_link_libraries(_xad PRIVATE XAD::xad)
-target_compile_definitions(_xad PRIVATE VERSION_INFO=${PROJECT_VERSION})
+# Note: We bake XAD directly into this module, rather than linking, since
+# otherwise we get conflicting definitions of the types when used in
+# QuantLib-Risks-Py which causes a segfault We assume a platform that at least
+# supports the AVX instructions set
+
+pybind11_add_module(
+  _xad
+  module.cpp
+  math.hpp
+  tape.hpp
+  real.hpp
+  exceptions.hpp
+  xad/src/Tape.cpp)
 
+target_include_directories(_xad PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/xad/src
+                                        xad/src)
+set_target_properties(_xad PROPERTIES CXX_STANDARD 17)
 if(MSVC)
-  # to allow using M_PI and the like
-  target_compile_definitions(_xad PRIVATE _USE_MATH_DEFINES)
+  target_compile_options(_xad PRIVATE -nologo -utf-8 "/arch:AVX")
+  target_compile_definitions(
+    _xad
+    PRIVATE VERSION_INFO=${PROJECT_VERSION}
+            _UNICODE
+            UNICODE
+            WIN32_LEAN_AND_MEAN
+            WIN32
+            _WIN32
+            _USE_MATH_DEFINES)
+  # static MSVC runtime to avoid linking issues in Python and QuantLib-Risks
   set_target_properties(_xad PROPERTIES MSVC_RUNTIME_LIBRARY
                                         "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+  target_compile_options(_xad PRIVATE -mavx -stdlib=libc++
+                                      -mmacosx-version-min=10.9)
+  target_compile_definitions(_xad PRIVATE VERSION_INFO=${PROJECT_VERSION})
+else()
+  target_compile_options(_xad PRIVATE -mavx)
+  target_compile_definitions(_xad PRIVATE VERSION_INFO=${PROJECT_VERSION})
 endif()