diff --git a/build/premake/extern_libs4.lua b/build/premake/extern_libs4.lua
index 96fefa9413..12e0c43968 100644
--- a/build/premake/extern_libs4.lua
+++ b/build/premake/extern_libs4.lua
@@ -271,13 +271,13 @@ extern_lib_defs = {
 	},
 	enet = {
 		compile_settings = function()
-			if not _OPTIONS["with-system-enet"] then
-				add_source_include_paths("enet")
+			if os.is("windows") or os.is("macosx") then
+				add_default_include_paths("enet")
 			end
 		end,
 		link_settings = function()
-			if not _OPTIONS["with-system-enet"] then
-				add_source_lib_paths("enet")
+			if os.is("windows") or os.is("macosx") then
+				add_default_lib_paths("enet")
 			end
 			add_default_links({
 				win_names  = { "enet" },
diff --git a/build/workspaces/update-workspaces.sh b/build/workspaces/update-workspaces.sh
index f9218ade78..1beba4bf42 100644
--- a/build/workspaces/update-workspaces.sh
+++ b/build/workspaces/update-workspaces.sh
@@ -40,7 +40,6 @@ premake_args=""
 
 without_nvtt=false
 with_system_nvtt=false
-with_system_enet=false
 with_system_miniupnpc=false
 with_system_mozjs24=false
 enable_atlas=true
@@ -50,7 +49,7 @@ do
   case $i in
     --without-nvtt ) without_nvtt=true; premake_args="${premake_args} --without-nvtt" ;;
     --with-system-nvtt ) with_system_nvtt=true; premake_args="${premake_args} --with-system-nvtt" ;;
-    --with-system-enet ) with_system_enet=true; premake_args="${premake_args} --with-system-enet" ;;
+    --with-system-enet ) echo "NOTE: the --with-system-enet option is deprecated, system ENet is now required"; echo ;;
     --with-system-miniupnpc ) with_system_miniupnpc=true; premake_args="${premake_args} --with-system-miniupnpc" ;;
     --with-system-mozjs24 ) with_system_mozjs24=true; premake_args="${premake_args} --with-system-mozjs24" ;;
     --enable-atlas ) enable_atlas=true ;;
@@ -95,10 +94,6 @@ if [ "`uname -s`" != "Darwin" ]; then
     (cd ../../libraries/source/nvtt && MAKE=${MAKE} JOBS=${JOBS} ./build.sh) || die "NVTT build failed"
   fi
   echo
-  if [ "$with_system_enet" = "false" ]; then
-    (cd ../../libraries/source/enet && MAKE=${MAKE} JOBS=${JOBS} ./build.sh) || die "ENet build failed"
-  fi
-  echo
   if [ "$with_system_miniupnpc" = "false" ]; then
     (cd ../../libraries/source/miniupnpc && MAKE=${MAKE} JOBS=${JOBS} ./build.sh) || die "MiniUPnPc build failed"
   fi
diff --git a/libraries/osx/build-osx-libs.sh b/libraries/osx/build-osx-libs.sh
index 56e5dabf9b..1855e2df07 100755
--- a/libraries/osx/build-osx-libs.sh
+++ b/libraries/osx/build-osx-libs.sh
@@ -42,10 +42,10 @@ GLOOX_VERSION="gloox-1.0.9"
 NSPR_VERSION="4.10.3"
 # OS X only includes part of ICU, and only the dylib
 ICU_VERSION="icu4c-52_1"
+ENET_VERSION="enet-1.3.12"
 # --------------------------------------------------------------
 # Bundled with the game:
 # * SpiderMonkey 24
-# * ENet 1.3.3
 # * NVTT
 # * FCollada
 # * MiniUPnPc
@@ -595,9 +595,39 @@ else
 fi
 popd > /dev/null
 
+# --------------------------------------------------------------
+echo -e "Building ENet..."
+
+LIB_VERSION="${ENET_VERSION}"
+LIB_ARCHIVE="$LIB_VERSION.tar.gz"
+LIB_DIRECTORY="$LIB_VERSION"
+LIB_URL="http://enet.bespin.org/download/"
+
+mkdir -p enet
+pushd enet > /dev/null
+
+if [[ "$force_rebuild" = "true" ]] || [[ ! -e .already-built ]] || [[ .already-built -ot $LIB_DIRECTORY ]]
+then
+  INSTALL_DIR="$(pwd)"
+
+  rm -f .already-built
+  download_lib $LIB_URL $LIB_ARCHIVE
+
+  rm -rf $LIB_DIRECTORY bin include lib sbin share
+  tar -xf $LIB_ARCHIVE
+  pushd $LIB_DIRECTORY
+
+  (./configure CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" --prefix=${INSTALL_DIR} --enable-shared=no && make clean && make ${JOBS} && make install) || die "ENet build failed"
+  popd
+  touch .already-built
+else
+  already_built
+fi
+popd > /dev/null
+
 # --------------------------------------------------------------------
 # The following libraries are shared on different OSes and may
-# be customzied, so we build and install them from bundled sources
+# be customized, so we build and install them from bundled sources
 # --------------------------------------------------------------------
 echo -e "Building Spidermonkey..."
 
@@ -669,25 +699,6 @@ else
 fi
 popd > /dev/null
 
-# --------------------------------------------------------------
-echo -e "Building ENet..."
-
-pushd ../source/enet/ > /dev/null
-
-if [[ "$force_rebuild" = "true" ]] || [[ ! -e .already-built ]]
-then
-  INSTALL_DIR="$(pwd)"
-  rm -f .already-built
-
-  pushd src
-  (./configure CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" --prefix=${INSTALL_DIR} --enable-shared=no && make clean && make ${JOBS} && make install) || die "ENet build failed"
-  popd
-  touch .already-built
-else
-  already_built
-fi
-popd > /dev/null
-
 # --------------------------------------------------------------
 # NVTT - no install
 echo -e "Building NVTT..."