I’m just starting with Lua. I have the newest pre-build lua 5.4 binaries for Windows, and the newest pre-built luarocks binaries for Windows, both from the “original sites”, but luarocks just won’t work. Neither with my lua54 install, nor with the lua 5.1 with which it is delivered. I tried both as a normal user, and as an Administrator, with the same result. The luarocks installation does not seem to itself copy it’s own lua version anywhere, so I copied it myself, and edited “luarocks.bat” to use it.

C:Windowssystem32>luarocks
C:Lualua54.exe: C:Program Files (x86)LuaRockslualuarockscoreutil.lua:18: attempt to concatenate a nil value
stack traceback:
        C:Program Files (x86)LuaRockslualuarockscoreutil.lua:18: in function 'luarocks.util.popen_read'
        C:Program Files (x86)LuaRockslualuarocksutil.lua:420: in function 'luarocks.util.check_lua_version'
        C:Program Files (x86)LuaRockslualuarocksutil.lua:491: in upvalue 'find_lua_bindir'
        C:Program Files (x86)LuaRockslualuarocksutil.lua:512: in function 'luarocks.util.find_lua'
        (...tail calls...)
        C:Program Files (x86)LuaRockslualuarockscmd.lua:633: in function 'luarocks.cmd.run_command'
        C:Program Files (x86)LuaRocksluarocks.lua:35: in main chunk
        [C]: in ?

C:Windowssystem32>luarocks
C:Program Files (x86)LuaRockswin32lua5.1binlua5.1.exe: ...gram Files (x86)LuaRockslualuarockscoreutil.lua:18: attempt to concatenate a nil value
stack traceback:
        ...gram Files (x86)LuaRockslualuarockscoreutil.lua:18: in function 'popen_read'
        ...:Program Files (x86)LuaRockslualuarocksutil.lua:420: in function 'check_lua_version'
        ...:Program Files (x86)LuaRockslualuarocksutil.lua:491: in function 'find_lua_bindir'
        ...:Program Files (x86)LuaRockslualuarocksutil.lua:512: in function <...:Program Files (x86)LuaRockslualuarocksutil.lua:510>
        (tail call): ?
        C:Program Files (x86)LuaRockslualuarockscmd.lua:633: in function 'run_command'
        C:Program Files (x86)LuaRocksluarocks.lua:35: in main chunk
        [C]: ?