diff --git a/.gitmodules b/.gitmodules
index be852bb8e..990be6e03 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -292,3 +292,6 @@
 [submodule "src/external/SecurityTokend"]
 	path = src/external/SecurityTokend
 	url = ../darling-SecurityTokend.git
+[submodule "src/external/lzfse"]
+	path = src/external/lzfse
+	url = ../lzfse.git
diff --git a/cmake/darling_static_lib.cmake b/cmake/darling_static_lib.cmake
index 68e61cbc4..150ca5955 100644
--- a/cmake/darling_static_lib.cmake
+++ b/cmake/darling_static_lib.cmake
@@ -1,3 +1,6 @@
+cmake_policy(SET CMP0069 NEW)
+cmake_policy(SET CMP0063 NEW)
+
 include(darling_lib)
 
 function(add_darling_static_library name)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e8836e474..5e04af0b3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -231,6 +231,7 @@ include_directories(AFTER
 	${CMAKE_CURRENT_SOURCE_DIR}/ApplicationServices/PrintCore/include
 	${CMAKE_CURRENT_SOURCE_DIR}/ApplicationServices/SpeechSynthesis/include
 	${CMAKE_CURRENT_SOURCE_DIR}/ColorSync/include
+	${CMAKE_CURRENT_SOURCE_DIR}/external/lzfse/include
 )
 
 add_subdirectory(external/libkqueue)
@@ -411,6 +412,7 @@ add_subdirectory(CoreAudio)
 add_subdirectory(CoreMedia)
 add_subdirectory(LDAP)
 add_subdirectory(ExceptionHandling)
+add_subdirectory(external/lzfse)
 
 # Just a stub
 add_subdirectory(WebKit)
diff --git a/src/external/darling-dmg b/src/external/darling-dmg
index 5f64bc9a3..9d19ebaa7 160000
--- a/src/external/darling-dmg
+++ b/src/external/darling-dmg
@@ -1 +1 @@
-Subproject commit 5f64bc9a3795e0a1c307e9beb099f9035fdd864f
+Subproject commit 9d19ebaa7f1be38e9c274351b620ebde5d91dd0c
diff --git a/src/external/lzfse b/src/external/lzfse
new file mode 160000
index 000000000..6262d29d2
--- /dev/null
+++ b/src/external/lzfse
@@ -0,0 +1 @@
+Subproject commit 6262d29d2bb461faab635926b83829819ce44a68