diff -Naur external_opencolorio/CMakeLists.txt external_opencolorio.patched/CMakeLists.txt
--- external_opencolorio/CMakeLists.txt	2018-01-04 18:38:27 -0700
+++ external_opencolorio.patched/CMakeLists.txt	2018-08-15 11:46:53 -0600
@@ -251,25 +251,30 @@
 if(USE_EXTERNAL_YAML)
     # Set minimum yaml version for non-patched sources.
     set(YAML_VERSION_MIN "0.3.0")
-    include(FindPkgConfig)
-    pkg_check_modules(PC_YAML_CPP REQUIRED QUIET yaml-cpp)
-    find_path(YAML_CPP_INCLUDE_DIR yaml-cpp/yaml.h
-        HINTS  ${PC_YAML_CPP_INCLUDEDIR} ${PC_YAML_CPP_INCLUDE_DIRS} )
-    find_library(YAML_CPP_LIBRARY LIBRARY_NAMES yaml-cpp libyaml-cpp
-        HINTS ${PC_YAML_CPP_LIBRARY_DIRS} )
-    set(YAML_CPP_LIBRARIES ${YAML_CPP_LIBRARY})
-    set(YAML_CPP_INCLUDE_DIRS ${YAML_CPP_INCLUDE_DIR})
-    set(YAML_CPP_VERSION ${PC_YAML_CPP_VERSION})
+    if(NOT WIN32)
+		include(FindPkgConfig)
+		pkg_check_modules(PC_YAML_CPP REQUIRED QUIET yaml-cpp)
+		find_path(YAML_CPP_INCLUDE_DIR yaml-cpp/yaml.h
+			HINTS  ${PC_YAML_CPP_INCLUDEDIR} ${PC_YAML_CPP_INCLUDE_DIRS} )
+		find_library(YAML_CPP_LIBRARY LIBRARY_NAMES yaml-cpp libyaml-cpp
+			HINTS ${PC_YAML_CPP_LIBRARY_DIRS} )
+		set(YAML_CPP_LIBRARIES ${YAML_CPP_LIBRARY})
+		set(YAML_CPP_INCLUDE_DIRS ${YAML_CPP_INCLUDE_DIR})
+		set(YAML_CPP_VERSION ${PC_YAML_CPP_VERSION})
 
-    if(YAML_CPP_VERSION VERSION_LESS ${YAML_VERSION_MIN})
-        message(FATAL_ERROR "ERROR: yaml-cpp ${YAML_VERSION_MIN} or greater is required.")
-    endif()
-
-    find_package_handle_standard_args(yaml-cpp
-                                      REQUIRED_VARS YAML_CPP_LIBRARIES YAML_CPP_INCLUDE_DIRS )
-    set(YAML_CPP_FOUND ${YAML-CPP_FOUND})
-    mark_as_advanced(YAML_CPP_INCLUDE_DIR YAML_CPP_LIBRARY YAML-CPP_FOUND)
+		if(YAML_CPP_VERSION VERSION_LESS ${YAML_VERSION_MIN})
+			message(FATAL_ERROR "ERROR: yaml-cpp ${YAML_VERSION_MIN} or greater is required.")
+		endif()
 
+		find_package_handle_standard_args(yaml-cpp
+										  REQUIRED_VARS YAML_CPP_LIBRARIES YAML_CPP_INCLUDE_DIRS )
+		set(YAML_CPP_FOUND ${YAML-CPP_FOUND})
+		mark_as_advanced(YAML_CPP_INCLUDE_DIR YAML_CPP_LIBRARY YAML-CPP_FOUND)
+	else()
+		set(EXTERNAL_INCLUDE_DIRS ${EXTERNAL_INCLUDE_DIRS} ${INC_1})
+		set(EXTERNAL_INCLUDE_DIRS ${EXTERNAL_INCLUDE_DIRS} ${INC_2})
+		message("INCLUDE DIRS = i:${EXTERNAL_INCLUDE_DIRS} |1:${INC_1} |2:${INC_2}")
+	endif()
     if(YAML_CPP_FOUND)
         if(YAML_CPP_VERSION VERSION_GREATER "0.5.0")
             # Need to also get the boost headers here, as yaml-cpp 0.5.0+ requires them.