diff --git a/build_files/build_environment/cmake/cython.cmake b/build_files/build_environment/cmake/cython.cmake
index c4666875f83..c943b515275 100644
--- a/build_files/build_environment/cmake/cython.cmake
+++ b/build_files/build_environment/cmake/cython.cmake
@@ -28,7 +28,7 @@ ExternalProject_Add(external_cython
 
   BUILD_COMMAND
     ${PYTHON_BINARY} setup.py
-      build ${CYTHON_BUILD_OPTION} -j${MAKE_THREADS}
+      build ${CYTHON_BUILD_OPTION} -j${PYTHON_MAKE_THREADS}
       install
       --old-and-unmanageable
 
diff --git a/build_files/build_environment/cmake/numpy.cmake b/build_files/build_environment/cmake/numpy.cmake
index caf78b28e83..fa420f4c63d 100644
--- a/build_files/build_environment/cmake/numpy.cmake
+++ b/build_files/build_environment/cmake/numpy.cmake
@@ -29,7 +29,7 @@ ExternalProject_Add(external_numpy
 
   BUILD_COMMAND
     ${PYTHON_BINARY} setup.py
-      build ${NUMPY_BUILD_OPTION} -j${MAKE_THREADS}
+      build ${NUMPY_BUILD_OPTION} -j${PYTHON_MAKE_THREADS}
       install
       --old-and-unmanageable
 
diff --git a/build_files/build_environment/cmake/options.cmake b/build_files/build_environment/cmake/options.cmake
index 7285382009d..1924aa0e853 100644
--- a/build_files/build_environment/cmake/options.cmake
+++ b/build_files/build_environment/cmake/options.cmake
@@ -11,6 +11,15 @@ option(FORCE_CHECK_HASH "Force a check of all hashses during CMake the configure
 cmake_host_system_information(RESULT NUM_CORES QUERY NUMBER_OF_LOGICAL_CORES)
 set(MAKE_THREADS ${NUM_CORES} CACHE STRING "Number of threads to run make with")
 
+# Any python module building with setup.py cannot use multiple theads on windows
+# as they will try to write to the same .pdb file simultaniously which causes
+# build errors.
+if(WIN32)
+  set(PYTHON_MAKE_THREADS 1)
+else()
+  set(PYTHON_MAKE_THREADS ${MAKE_THREADS})
+endif()
+
 if(NOT BUILD_MODE)
   set(BUILD_MODE "Release")
   message(STATUS "Build type not specified: defaulting to a release build.")
diff --git a/build_files/build_environment/cmake/package_python.cmake b/build_files/build_environment/cmake/package_python.cmake
index 8077fe36d1a..34b0d871cba 100644
--- a/build_files/build_environment/cmake/package_python.cmake
+++ b/build_files/build_environment/cmake/package_python.cmake
@@ -48,6 +48,8 @@ if(MSVC)
         external_python
         external_numpy
         external_python_site_packages
+        external_zstandard
+        external_cython
       OUTPUT
         ${HARVEST_TARGET}/python/${PYTHON_SHORT_VERSION_NO_DOTS}/bin/python${PYTHON_POSTFIX}.exe
     )
@@ -92,7 +94,11 @@ if(MSVC)
     add_custom_target(Package_Python
       ALL
       DEPENDS
-        external_python external_numpy external_python_site_packages
+        external_python 
+        external_numpy 
+        external_python_site_packages 
+        external_zstandard
+        external_cython
       OUTPUT
       ${PYTARGET}/bin/python${PYTHON_POSTFIX}.exe
     )
diff --git a/build_files/build_environment/cmake/zstandard.cmake b/build_files/build_environment/cmake/zstandard.cmake
index 9c45f7383fb..36f894a4f1f 100644
--- a/build_files/build_environment/cmake/zstandard.cmake
+++ b/build_files/build_environment/cmake/zstandard.cmake
@@ -28,7 +28,7 @@ ExternalProject_Add(external_zstandard
 
   BUILD_COMMAND
     ${PYTHON_BINARY} setup.py
-      build ${ZSTANDARD_BUILD_OPTION} -j${MAKE_THREADS}
+      build ${ZSTANDARD_BUILD_OPTION} -j${PYTHON_MAKE_THREADS}
       install
       --old-and-unmanageable
 
@@ -38,4 +38,5 @@ ExternalProject_Add(external_zstandard
 add_dependencies(
   external_zstandard
   external_python
+  external_zstd
 )
diff --git a/build_files/build_environment/cmake/zstd.cmake b/build_files/build_environment/cmake/zstd.cmake
index 39aa549b1a7..f77e2ae41aa 100644
--- a/build_files/build_environment/cmake/zstd.cmake
+++ b/build_files/build_environment/cmake/zstd.cmake
@@ -40,7 +40,18 @@ if(WIN32)
       COMMAND ${CMAKE_COMMAND} -E copy_directory
         ${LIBDIR}/zstd/include/
         ${HARVEST_TARGET}/zstd/include/
-
+      # The zstandard python extention hardcoded links to ztsd.lib
+      COMMAND ${CMAKE_COMMAND} -E copy 
+        ${LIBDIR}/zstd/lib/zstd_static${LIBEXT}
+        ${LIBDIR}/zstd/lib/zstd${LIBEXT}
+      DEPENDEES install
+    )
+  else()
+    ExternalProject_Add_Step(external_zstd after_install
+      # The zstandard python extention hardcoded links to ztsd.lib
+      COMMAND ${CMAKE_COMMAND} -E copy 
+        ${LIBDIR}/zstd/lib/zstd_static${LIBEXT}
+        ${LIBDIR}/zstd/lib/zstd${LIBEXT}
       DEPENDEES install
     )
   endif()