diff --git a/build/buildmsvc_lua53.bat b/build/buildmsvc_lua53.bat
index 138a575..5a02214 100644
--- a/build/buildmsvc_lua53.bat
+++ b/build/buildmsvc_lua53.bat
@@ -1,127 +1,179 @@
+cd ravi-external-libs
+rmdir build /s /q
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
+cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
+cd ..\..
+
 cd lua
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-ffi
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch-paths
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7-sys
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7-xlua
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-moses
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-filesystem
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7-nn
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7-optim
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch7-autograd
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-torch-cephes
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-penlight
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-cjson
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-lpeglabel
-rmdir build /s
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
 
 cd ravi-luasocket
-rmdir build /s
+rmdir build /s /q
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
+cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
+cd ..\..
+
+cd ravi-libuv-luv
+rmdir build /s /q
 mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=c:/Software/lua53 -DUSE_LUA53=ON -G "Visual Studio 15 2017 Win64" ..
+if %errorlevel% neq 0 exit /b %errorlevel%
 cmake --build . --config Release --target INSTALL
+if %errorlevel% neq 0 exit /b %errorlevel%
 cd ..\..
diff --git a/lua b/lua
index db50625..26d9fe8 160000
--- a/lua
+++ b/lua
@@ -1 +1 @@
-Subproject commit db50625f5a477064f22a39f11276ce763c00c301
+Subproject commit 26d9fe86009d7d89b2decb3d669459ad4ec1747e