diff --git a/set-0.2.1-1.rockspec b/set-0.2.1-1.rockspec
index cbd98d0..f58e1fc 100644
--- a/set-0.2.1-1.rockspec
+++ b/set-0.2.1-1.rockspec
@@ -13,7 +13,7 @@ description = {
   license = "LGPL+"
 }
 dependencies = {
-  "lua >= 5.2",
+  "lua >= 5.1",
   "lunitx >= 0.6"
 }
 build = {
diff --git a/set-0.2.1-2.rockspec b/set-0.2.1-2.rockspec
new file mode 100644
index 0000000..c47ae73
--- /dev/null
+++ b/set-0.2.1-2.rockspec
@@ -0,0 +1,25 @@
+package = "set"
+version = "0.2.1-2"
+source = {
+  url = "git://github.com/wscherphof/lua-set.git",
+  branch = "v0.2.1"
+}
+description = {
+  summary = "Straightforward Set library",
+  detailed = [[
+    Creating and manipulating sets, including + (union), - (subtraction), * (intersection), len(), and tostring()
+  ]],
+  homepage = "http://wscherphof.github.io/lua-set/",
+  license = "LGPL+"
+}
+dependencies = {
+  "lua >= 5.1",
+  "lunitx >= 0.6"
+}
+build = {
+  type = "builtin",
+  copy_directories = {"doc", "tst"},
+  modules = {
+    ["Set.init"] = "src/Set/init.lua"
+  }
+}
diff --git a/tst/init.lua b/tst/init.lua
index c278bbc..5a6d45b 100644
--- a/tst/init.lua
+++ b/tst/init.lua
@@ -1,6 +1,6 @@
 require("luarocks.loader")
 -- Omit next line in actual module clients; it's only to support development of the module itself
-package.path = "../src/?/init.lua;" .. package.path
+package.path = "../src/?/init.lua;" .. "./src/?/init.lua;" .. package.path
 
 local lunitx = require("lunitx")
 module("test_set", lunitx.testcase, package.seeall)
@@ -36,7 +36,26 @@ end
 function test_tostring()
   assert_equal(Set.mt.__tostring(Set:new({1, 2, 3})), "{1, 2, 3}")
   assert_equal(9,  #Set.mt.__tostring(Set:new({"a", "b", "c"})), "{a, b, c}               (or in a different permutation)")
-  assert_equal(23, #Set.mt.__tostring(Set:new({ {} })),          "{table: 0x7ff498c52ea0} (but a different same-length key)")
+  local expected_length;
+  -- this will be 18 on lua5.2, 19 on luajit, and either 17 or 18 on lua5.1 randomly
+  -- those numbers might totally change on a 32 bit architecture.
+  expected_length = #(tostring({}))+2;
+  if _VERSION == 'Lua 5.1' then
+      if jit then
+          weird = 19 ~= expected_length;
+      else
+          if(expected_length ~= 17 and expected_length ~= 18) then
+              weird = true
+          end
+      end
+  else
+      weird = 18 ~= expected_length
+  end
+  if weird then
+      print('Warning: expected_length of tostring(table) was sort of weird: '..expected_length)
+  end
+
+  assert_equal(expected_length, #Set.mt.__tostring(Set:new({ {} })),          "{table: 0x7ff498c52ea0} (but a different same-length key)")
 end
 
 function test_new_len()