diff -urN synergy-1.4.17-Source/CMakeLists.txt synergy-1.4.17-Source-fix/CMakeLists.txt
--- synergy-1.4.17-Source/CMakeLists.txt	2014-03-14 21:34:19.000000000 +0100
+++ synergy-1.4.17-Source-fix/CMakeLists.txt	2014-04-11 13:37:18.839338710 +0200
@@ -145,6 +145,9 @@
 	check_type_size(long SIZEOF_LONG)
 	check_type_size(short SIZEOF_SHORT)
 
+	# let's just assume cryptopp exists (provided by the Nix expression)
+	list(APPEND libs cryptopp)
+
 	# pthread is used on both Linux and Mac
 	check_library_exists("pthread" pthread_create "" HAVE_PTHREAD)
 	if (HAVE_PTHREAD)
@@ -317,7 +320,6 @@
 endif()
 
 add_subdirectory(src)
-add_subdirectory(ext)
 
 if (WIN32)
 	# TODO:	consider using /analyze to uncover potential bugs in the source code.
diff -urN synergy-1.4.17-Source/src/lib/io/CryptoMode_cryptopp.h synergy-1.4.17-Source-fix/src/lib/io/CryptoMode_cryptopp.h
--- synergy-1.4.17-Source/src/lib/io/CryptoMode_cryptopp.h	2014-02-28 13:36:45.000000000 +0100
+++ synergy-1.4.17-Source-fix/src/lib/io/CryptoMode_cryptopp.h	2014-04-11 13:36:01.111985556 +0200
@@ -25,6 +25,6 @@
 #	pragma GCC system_header
 #endif 
 
-#include <cryptopp562/gcm.h>
-#include <cryptopp562/modes.h>
-#include <cryptopp562/aes.h>
+#include <cryptopp/gcm.h>
+#include <cryptopp/modes.h>
+#include <cryptopp/aes.h>
diff -urN synergy-1.4.17-Source/src/lib/io/CryptoStream_cryptopp.h synergy-1.4.17-Source-fix/src/lib/io/CryptoStream_cryptopp.h
--- synergy-1.4.17-Source/src/lib/io/CryptoStream_cryptopp.h	2014-02-28 13:36:45.000000000 +0100
+++ synergy-1.4.17-Source-fix/src/lib/io/CryptoStream_cryptopp.h	2014-04-11 13:36:07.173013005 +0200
@@ -25,5 +25,5 @@
 #	pragma GCC system_header
 #endif
 
-#include <cryptopp562/osrng.h>
-#include <cryptopp562/sha.h>
+#include <cryptopp/osrng.h>
+#include <cryptopp/sha.h>