Public bug reported:

https://salsa.debian.org/lua-
team/luarocks/-/commit/9ab9c270214b12c39d18961a34dc51c6f509765d#note_780536

Would you be willing to upgrade to [`luarocks
v3.13.0`](https://github.com/luarocks/luarocks/releases) to fix issues
related to lua5.5?  Luarocks fails to make lua5.5 variables `LUA_INCDIR`
and `LUA_INCDIR_OK`.

Steps to reproduce:
% `docker run -it ubuntu:26.04`
```bash
apt-get update  -q -q --yes
apt-get install -q -q --yes lua5.4 liblua5.4-dev lua5.5 liblua5.5-dev luarocks
lua -v  # Lua 5.1.5  # even though we just installed 5.4 and 5.5, I think 
luarocks v3.13 fixes this.
luarocks --version  # /usr/bin/luarocks 3.8.0  # Not current >= 3.13.0 with 
valuable lua5.5 fixes.
luarocks --lua-version=5.4 config | grep INC  # --> "/usr/include/lua5.4", true
luarocks --lua-version=5.5 config | grep INC  # --> Nothing!!

# Let's manually set lua5.5's LUA_INCDIR and LUA_INCDIR_OK to be similar to 
lua5.4's...
mkdir -p $HOME/.luarocks  # required before setting luarocks config variables.
luarocks --lua-version=5.5 config variables.LUA_INCDIR /usr/include/lua5.5
luarocks --lua-version=5.5 config variables.LUA_INCDIR_OK true
luarocks --lua-version=5.5 config | grep INC  # --> "/usr/include/lua5.5", true
```
https://discourse.ubuntu.com/t/apt-install-luarocks-could-be-updated-to-support-lua5-5/85151

ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: liblua5.5-dev 5.5.0-3
Uname: Linux 6.12.76-linuxkit aarch64
ApportVersion: 2.34.0-0ubuntu2
Architecture: arm64
CasperMD5CheckResult: unknown
CloudBuildName: ubuntu-oci:minimized
CloudSerial: 20260627
Date: Tue Jul 14 11:25:21 2026
ProcEnviron:
 PATH=(custom, no user)
 TERM=xterm
SourcePackage: lua5.5
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: lua5.5 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug arm64 cloud-image resolute

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https://bugs.launchpad.net/bugs/2160601

Title:
  Luarocks fails to make lua5.5 variables LUA_INCDIR and LUA_INCDIR_OK

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