diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 998fcb15ff..6ac51974e4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -408,7 +408,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: install docfx
-      run: choco install docfx -y
+      run: choco install docfx -y --version=2.58.5
     - name: run ./ci/docfx.cmd
       shell: cmd
       run: ./ci/docfx.cmd
diff --git a/.gitignore b/.gitignore
index a307af966e..8a55a4ca4a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,3 +48,5 @@
 /bazel-*
 /plugin
 /build
+
+tags
diff --git a/api/include/opentelemetry/common/spin_lock_mutex.h b/api/include/opentelemetry/common/spin_lock_mutex.h
index b30fd3f44b..b35f54081a 100644
--- a/api/include/opentelemetry/common/spin_lock_mutex.h
+++ b/api/include/opentelemetry/common/spin_lock_mutex.h
@@ -13,6 +13,7 @@
 #  ifndef NOMINMAX
 #    define NOMINMAX
 #  endif
+#  define _WINSOCKAPI_  // stops including winsock.h
 #  include <windows.h>
 #elif defined(__i386__) || defined(__x86_64__)
 #  if defined(__clang__)
diff --git a/exporters/jaeger/CMakeLists.txt b/exporters/jaeger/CMakeLists.txt
index b6108013d6..0659c399b0 100644
--- a/exporters/jaeger/CMakeLists.txt
+++ b/exporters/jaeger/CMakeLists.txt
@@ -58,6 +58,8 @@ install(
   PATTERN "recordable.h" EXCLUDE)
 
 if(BUILD_TESTING)
+  add_definitions(-DGTEST_LINKED_AS_SHARED_LIBRARY=1)
+
   add_executable(jaeger_recordable_test test/jaeger_recordable_test.cc)
   target_link_libraries(
     jaeger_recordable_test ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT}
@@ -69,7 +71,6 @@ if(BUILD_TESTING)
     TEST_LIST jaeger_recordable_test)
 
   add_executable(jaeger_exporter_test test/jaeger_exporter_test.cc)
-  add_definitions(-DGTEST_LINKED_AS_SHARED_LIBRARY=1)
   if(MSVC)
     if(GMOCK_LIB)
       unset(GMOCK_LIB CACHE)
diff --git a/exporters/zipkin/CMakeLists.txt b/exporters/zipkin/CMakeLists.txt
index 46a13ac787..b9591324fd 100644
--- a/exporters/zipkin/CMakeLists.txt
+++ b/exporters/zipkin/CMakeLists.txt
@@ -37,6 +37,8 @@ install(
   PATTERN "recordable.h" EXCLUDE)
 
 if(BUILD_TESTING)
+  add_definitions(-DGTEST_LINKED_AS_SHARED_LIBRARY=1)
+
   add_executable(zipkin_recordable_test test/zipkin_recordable_test.cc)
 
   target_link_libraries(
diff --git a/exporters/zipkin/test/zipkin_exporter_test.cc b/exporters/zipkin/test/zipkin_exporter_test.cc
index 42654c2fb0..67d5c1c8ce 100644
--- a/exporters/zipkin/test/zipkin_exporter_test.cc
+++ b/exporters/zipkin/test/zipkin_exporter_test.cc
@@ -3,7 +3,6 @@
 
 #ifndef HAVE_CPP_STDLIB
 
-#  define _WINSOCKAPI_  // stops including winsock.h
 #  include "opentelemetry/exporters/zipkin/zipkin_exporter.h"
 #  include <string>
 #  include "opentelemetry/ext/http/client/curl/http_client_curl.h"
diff --git a/ext/include/opentelemetry/ext/http/client/curl/http_operation_curl.h b/ext/include/opentelemetry/ext/http/client/curl/http_operation_curl.h
index fa727899e4..5aaaa0a0e5 100644
--- a/ext/include/opentelemetry/ext/http/client/curl/http_operation_curl.h
+++ b/ext/include/opentelemetry/ext/http/client/curl/http_operation_curl.h
@@ -7,7 +7,6 @@
 #include "opentelemetry/ext/http/client/http_client.h"
 #include "opentelemetry/version.h"
 
-#include <curl/curl.h>
 #include <future>
 #include <map>
 #include <regex>
@@ -16,9 +15,11 @@
 #include <vector>
 #ifdef _WIN32
 #  include <io.h>
+#  include <winsock2.h>
 #else
 #  include <unistd.h>
 #endif
+#include <curl/curl.h>
 
 OPENTELEMETRY_BEGIN_NAMESPACE
 namespace ext