Issue installing pytorch

[sagarwaghmare69]

I am following the instructions from README:installation.
I installed torch with lua5.2 instead of luajit.
I added TORCH_INSTALL variable to my .bashrc.
When I run ./build.sh I get following error. Any help is appreciated

./build.sh
Cannot uninstall requirement PyTorch, not installed
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Torch7 in /home/swaghmare/torch/install
-- Configuring done
-- Generating done
-- Build files have been written to: /home/swaghmare/repositories/pytorch/cbuild
Scanning dependencies of target PyTorchNative
[ 33%] Building CXX object CMakeFiles/PyTorchNative.dir/src/LuaHelper.cpp.o
[ 66%] Building CXX object CMakeFiles/PyTorchNative.dir/src/nnWrapper.cpp.o
In file included from /home/swaghmare/repositories/pytorch/src/LuaHelper.cpp:6:0:
/home/swaghmare/torch/install/include/luaT.h:41:12: warning: ‘int luaL_typerror(lua_State*, int, const char*)’ defined but not used [-Wunused-function]
static int luaL_typerror(lua_State L, int narg, const char tname)
^
In file included from /home/swaghmare/repositories/pytorch/src/nnWrapper.cpp:17:0:
/home/swaghmare/torch/install/include/luaT.h:41:12: warning: ‘int luaL_typerror(lua_State, int, const char)’ defined but not used [-Wunused-function]
static int luaL_typerror(lua_State *L, int narg, const char *tname)
^
[100%] Linking CXX shared library libPyTorchNative.so
/usr/bin/ld: cannot find -lluajit
collect2: error: ld returned 1 exit status
CMakeFiles/PyTorchNative.dir/build.make:122: recipe for target 'libPyTorchNative.so' failed
make[2]: *** [libPyTorchNative.so] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/PyTorchNative.dir/all' failed
make[1]: *** [CMakeFiles/PyTorchNative.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2