Add luarocks-nix

Add initial (not working yet) nix expression for scilua package

home/prog/default.nix

@@ -6,6 +6,7 @@
 
     # Lua
     lua
+    luarocks-nix
     lua-language-server
     stylua
 

home/prog/luarocks/scilua.nix

@@ -0,0 +1,31 @@
+{
+  buildLuarocksPackage,
+  fetchurl,
+  lua,
+  luaAtLeast,
+  luaOlder,
+  xsys,
+}:
+buildLuarocksPackage {
+  pname = "sci";
+  version = "1.0.0.beta12-1";
+  knownRockspec =
+    (fetchurl {
+      url = "mirror://luarocks/sci-1.0.0.beta12-1.rockspec";
+      sha256 = "0lprn9x4zw767hdz8lyxmwrrfyn5xj3x50pm9b4qiwy8992mg00r";
+    })
+    .outPath;
+  src = fetchurl {
+    url = "https://github.com/stepelu/lua-sci/archive/v1.0.0-beta12.tar.gz";
+    sha256 = "0a45r7n13gfqckpdp1bmizqvjadn8nc5d6ff9gjw860g3i75sy2h";
+  };
+
+  disabled = (luaOlder "5.1") || (luaAtLeast "5.4");
+  propagatedBuildInputs = [lua xsys];
+
+  meta = {
+    homepage = "https://github.com/stepelu/lua-sci";
+    description = "Scientific Computing with LuaJIT";
+    license.fullName = "MIT";
+  };
+}