diff --git a/cmake/EthDependencies.cmake b/cmake/EthDependencies.cmake
index 376a6c03f..09de078c0 100644
--- a/cmake/EthDependencies.cmake
+++ b/cmake/EthDependencies.cmake
@@ -3,14 +3,18 @@
 
 # by defining this variable, cmake will look for dependencies first in our own repository before looking in system paths like /usr/local/ ...
 # this must be set to point to the same directory as $ETH_DEPENDENCY_INSTALL_DIR in /extdep directory
-set (CMAKE_FIND_ROOT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/extdep/install")
+string(TOLOWER ${CMAKE_SYSTEM_NAME} system_name)
+set (CMAKE_FIND_ROOT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/extdep/install/${system_name}")
 
-find_package (CryptoPP 5.6.2 REQUIRED)
+
+# Dependencies must have a version number + EXACT, to ensure reproducible builds
+
+find_package (CryptoPP 5.6.2 EXACT REQUIRED)
 message(" - CryptoPP header: ${CRYPTOPP_INCLUDE_DIRS}")
 message(" - CryptoPP lib   : ${CRYPTOPP_LIBRARIES}")
 
 
-find_package (JsonRpcCpp REQUIRED)
+find_package (JsonRpcCpp 0.2.1 EXACT REQUIRED)
 if (${JSON_RPC_CPP_FOUND})
     message (" - json-rpc-cpp header: ${JSON_RPC_CPP_INCLUDE_DIRS}")
     message (" - json-rpc-cpp lib   : ${JSON_RPC_CPP_LIBRARIES}")
diff --git a/eth/CMakeLists.txt b/eth/CMakeLists.txt
index cb3b01b4e..fbd7d6835 100644
--- a/eth/CMakeLists.txt
+++ b/eth/CMakeLists.txt
@@ -3,6 +3,7 @@ cmake_policy(SET CMP0015 NEW)
 aux_source_directory(. SRC_LIST)
 
 include_directories(..)
+include_directories(${JSON_RPC_CPP_INCLUDE_DIRS})
 
 set(EXECUTABLE eth)
 
diff --git a/extdep/CMakeLists.txt b/extdep/CMakeLists.txt
index 666ea5f15..88f4fba0a 100644
--- a/extdep/CMakeLists.txt
+++ b/extdep/CMakeLists.txt
@@ -2,8 +2,10 @@ cmake_minimum_required(VERSION 2.8)
 
 include(ExternalProject)
 
-# all dependencies will be installed into this directory
-set(ETH_DEPENDENCY_INSTALL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/install")
+
+# all dependencies will be installed into this directory, separated by platform
+string(TOLOWER ${CMAKE_SYSTEM_NAME} SYSTEM_NAME)
+set(ETH_DEPENDENCY_INSTALL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/install/${SYSTEM_NAME}")
 file(MAKE_DIRECTORY ${ETH_DEPENDENCY_INSTALL_DIR})
 
 include(cryptopp.cmake)
diff --git a/extdep/cryptopp.cmake b/extdep/cryptopp.cmake
index 39a848649..3a1513e29 100644
--- a/extdep/cryptopp.cmake
+++ b/extdep/cryptopp.cmake
@@ -1,18 +1,21 @@
-if(${APPLE})
-ExternalProject_Add(cryptopp
-     URL https://downloads.sourceforge.net/project/cryptopp/cryptopp/5.6.2/cryptopp562.zip
-     BINARY_DIR cryptopp-prefix/src/cryptopp
-     CONFIGURE_COMMAND ""
-     BUILD_COMMAND make CXX=clang++ CXXFLAGS=-DCRYPTOPP_DISABLE_ASM
-     INSTALL_COMMAND make install PREFIX=${ETH_DEPENDENCY_INSTALL_DIR}
+# CryptoPP does not have good cross-platform support, there exist several different other projects to make it work ... 
+
+if(APPLE)
+    ExternalProject_Add(cryptopp
+         URL https://downloads.sourceforge.net/project/cryptopp/cryptopp/5.6.2/cryptopp562.zip
+         BINARY_DIR cryptopp-prefix/src/cryptopp
+         CONFIGURE_COMMAND ""
+         BUILD_COMMAND make CXX=clang++ CXXFLAGS=-DCRYPTOPP_DISABLE_ASM
+         INSTALL_COMMAND make install PREFIX=${ETH_DEPENDENCY_INSTALL_DIR}
 )
+# on Linux, the default Makefile does not work.
 else()
-ExternalProject_Add(cryptopp
-	URL https://github.com/mmoss/cryptopp/archive/v5.6.2.zip
-	BINARY_DIR cryptopp-prefix/src/cryptopp
-	CONFIGURE_COMMAND ""
-	BUILD_COMMAND scons --shared --prefix=${ETH_DEPENDENCY_INSTALL_DIR}
-	INSTALL_COMMAND ""
+    ExternalProject_Add(cryptopp
+        URL https://github.com/mmoss/cryptopp/archive/v5.6.2.zip
+        BINARY_DIR cryptopp-prefix/src/cryptopp
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND scons --shared --prefix=${ETH_DEPENDENCY_INSTALL_DIR}
+        INSTALL_COMMAND ""
 )
 endif()
 	
diff --git a/extdep/curl.cmake b/extdep/curl.cmake
index 13e10361d..fa06d7ba0 100644
--- a/extdep/curl.cmake
+++ b/extdep/curl.cmake
@@ -1,20 +1,13 @@
-
-set (CONFIG_CMD  ./configure --prefix=${ETH_DEPENDENCY_INSTALL_DIR} --exec-prefix=${ETH_DEPENDENCY_INSTALL_DIR})
-
-if(${APPLE})
+if(APPLE)
 	set(CONFIG_CMD  ./configure --with-darwinssl --prefix=${ETH_DEPENDENCY_INSTALL_DIR} --exec-prefix=${ETH_DEPENDENCY_INSTALL_DIR})
+else()
+    set (CONFIG_CMD  ./configure --prefix=${ETH_DEPENDENCY_INSTALL_DIR} --exec-prefix=${ETH_DEPENDENCY_INSTALL_DIR})
 endif()
 
-
-
-ExternalProject_Add(
-	curl
+ExternalProject_Add(curl
 	URL http://curl.haxx.se/download/curl-7.38.0.tar.bz2 
 	BINARY_DIR curl-prefix/src/curl
 	CONFIGURE_COMMAND ${CONFIG_CMD}
 	BUILD_COMMAND make -j 3
 	INSTALL_COMMAND make install
 )
-
-
-
diff --git a/extdep/json-rpc-cpp.cmake b/extdep/json-rpc-cpp.cmake
index ea26851b9..8d3b29c19 100644
--- a/extdep/json-rpc-cpp.cmake
+++ b/extdep/json-rpc-cpp.cmake
@@ -1,11 +1,21 @@
+# json-rpc-cpp is under heavy development, and multiplatform builds are not yet available. All the platforms currently need patches to make them work.
+
+if(APPLE)
+    set(PATCH_CMD patch -d src/example < ${CMAKE_CURRENT_SOURCE_DIR}/json-rpc-cpp_osx.patch)
+	set(CONFIG_CMD cmake -DCMAKE_INSTALL_PREFIX=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_MODULE_PATH:PATH=${CMAKE_CURRENT_SOURCE_DIR} -DETH_DEPENDENCY_INSTALL_DIR:PATH=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_BUILD_TYPE=None -DCMAKE_FIND_FRAMEWORK=LAST -Wno-dev .)
+else()
+    set(PATCH_CMD patch --input=${CMAKE_CURRENT_SOURCE_DIR}/json-rpc-cpp_linux.patch --strip=1)
+    set(CONFIG_CMD cmake -DCMAKE_INSTALL_PREFIX=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_MODULE_PATH:PATH=${CMAKE_CURRENT_SOURCE_DIR} -DETH_DEPENDENCY_INSTALL_DIR:PATH=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_BUILD_TYPE=None -DCMAKE_FIND_FRAMEWORK=LAST .)
+endif()
+
+
 ExternalProject_Add(json-rpc-cpp
 	DEPENDS curl
 	GIT_REPOSITORY https://github.com/cinemast/libjson-rpc-cpp.git 
 	GIT_TAG 0.2.1
 	BINARY_DIR json-rpc-cpp-prefix/src/json-rpc-cpp
-    CONFIGURE_COMMAND patch -d src/example < ${CMAKE_CURRENT_SOURCE_DIR}/json-rpc-cpp_osx.patch && cmake -DCMAKE_INSTALL_PREFIX=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_MODULE_PATH:PATH=${CMAKE_CURRENT_SOURCE_DIR} -DETH_DEPENDENCY_INSTALL_DIR:PATH=${ETH_DEPENDENCY_INSTALL_DIR} -DCMAKE_BUILD_TYPE=None -DCMAKE_FIND_FRAMEWORK=LAST -Wno-dev .
+    PATCH_COMMAND ${PATCH_CMD}
+    CONFIGURE_COMMAND ${CONFIG_CMD}
 	BUILD_COMMAND make jsonrpc -j 3
 	INSTALL_COMMAND make install
-	)
-
-
+)
diff --git a/extdep/json-rpc-cpp_linux.patch b/extdep/json-rpc-cpp_linux.patch
new file mode 100644
index 000000000..40662f2a8
--- /dev/null
+++ b/extdep/json-rpc-cpp_linux.patch
@@ -0,0 +1,13 @@
+diff --git a/src/jsonrpc/CMakeLists.txt b/src/jsonrpc/CMakeLists.txt
+index 79e8515..4e93eef 100644
+--- a/src/jsonrpc/CMakeLists.txt
++++ b/src/jsonrpc/CMakeLists.txt
+@@ -12,7 +12,7 @@ set(VERSION_STRING ${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION})
+ set_target_properties(jsonrpc jsonrpcStatic PROPERTIES VERSION "${VERSION_STRING}" SOVERSION "${VERSION_MAJOR}")
+ 
+ 
+-target_link_libraries(jsonrpc ${CURL_LIBRARIES})
++target_link_libraries(jsonrpc ${CURL_LIBRARIES} dl pthread)
+ target_link_libraries(jsonrpcStatic ${CURL_LIBRARIES})
+ 
+ install(FILES ${jsonrpc_header} DESTINATION include/jsonrpc) 
diff --git a/neth/CMakeLists.txt b/neth/CMakeLists.txt
index d9f551b18..bef34c4e3 100644
--- a/neth/CMakeLists.txt
+++ b/neth/CMakeLists.txt
@@ -4,6 +4,7 @@ aux_source_directory(. SRC_LIST)
 
 include_directories(..)
 include_directories(${LEVELDB_ID})
+include_directories(${JSON_RPC_CPP_INCLUDE_DIRS})
 
 set(EXECUTABLE neth)