$OpenBSD$
--- CMakeLists.txt.orig	Sat Oct  1 14:06:40 2011
+++ CMakeLists.txt	Fri Mar  2 01:15:28 2012
@@ -414,6 +414,12 @@ INCLUDE_DIRECTORIES (${SDLMIXER_INCLUDE_DIR})
 FIND_PACKAGE (SDL_net REQUIRED)
 INCLUDE_DIRECTORIES (${SDLNET_INCLUDE_DIR})
 
+FIND_PACKAGE (PNG REQUIRED)
+INCLUDE_DIRECTORIES (${PNG_INCLUDE_DIR})
+
+FIND_PACKAGE (ZLIB REQUIRED)
+INCLUDE_DIRECTORIES (${ZLIB_INCLUDE_DIR})
+
 ## FIXME: This is an inelegant hack to find, and grab all needed
 ## .dll support files on windows. It works by looking for SDL.dll
 ## then taking every .dll file found in that directory from your SDK.
@@ -430,11 +436,11 @@ ENDIF (WIN32)
 ################################################################################
 ######################### Set Build Targets   ##################################
 
-INCLUDE_DIRECTORIES(libpng)
-INCLUDE_DIRECTORIES(zlib)
+#INCLUDE_DIRECTORIES(libpng)
+#INCLUDE_DIRECTORIES(zlib)
 
-ADD_SUBDIRECTORY(zlib)
-ADD_SUBDIRECTORY(libpng)
+#ADD_SUBDIRECTORY(zlib)
+#ADD_SUBDIRECTORY(libpng)
 ADD_SUBDIRECTORY(snes_spc)
 ADD_SUBDIRECTORY(source)