-INSTALL_PATH = /usr/lib/system
-INSTALL_PATH[sdk=iphoneos*] = /usr/lib/system
-INSTALL_PATH[sdk=iphonesimulator*] = $(SDKROOT)/usr/lib/system
-INSTALL_PATH[sdk=macosx*] = /usr/lib/system
-PUBLIC_HEADERS_FOLDER_PATH = /usr/include/mach
-PUBLIC_HEADERS_FOLDER_PATH[sdk=iphoneos*] = /usr/include/mach
-PUBLIC_HEADERS_FOLDER_PATH[sdk=iphonesimulator*] = $(SDKROOT)/usr/include/mach
-PUBLIC_HEADERS_FOLDER_PATH[sdk=macosx*] = /usr/include/mach
-PRIVATE_HEADERS_FOLDER_PATH = /usr/local/include
-PRIVATE_HEADERS_FOLDER_PATH[sdk=iphoneos*] = /usr/local/include
-PRIVATE_HEADERS_FOLDER_PATH[sdk=iphonesimulator*] = $(SDKROOT)/usr/local/include
-PRIVATE_HEADERS_FOLDER_PATH[sdk=macosx*] = /usr/local/include
+INSTALL_PATH_ACTUAL = /usr/lib/system
+PUBLIC_HEADERS_FOLDER_PATH = $(INSTALL_PATH_PREFIX)/usr/include
+PRIVATE_HEADERS_FOLDER_PATH = $(INSTALL_PATH_PREFIX)/usr/local/include
+OS_PRIVATE_HEADERS_FOLDER_PATH = $(INSTALL_PATH_PREFIX)/usr/local/include/os