20 files changed, 147 insertions, 37 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index af9a294..06ff748 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,14 +21,13 @@ The scope of what is covered by the version number excludes:
 - commit the changes as `Release vX.Y.Z`
 - push the commit, and create a release PR
 - after merging tag the release commit with `vX.Y.Z`
-- upload to LuaRocks:<br/>
-  `luarocks upload ./rockspecs/luasystem-X.Y.Z-1.rockspec --api-key=ABCDEFGH`
+- upload to LuaRocks will be automatic by the CI runners
 - test the newly created rock:<br/>
   `luarocks install luasystem`
 
 ## Version history
 
-### unreleased
+### version 0.5.0, released 02-Mar-2025
 
 - Feat: when detecting character display width, also accept unicode codepoints (integers),
   since the Lua utf8 library returns codepoints, not strings
diff --git a/LICENSE.md b/LICENSE.md
index 92f0bbb..4eba941 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,7 +1,7 @@
 # MIT License
 
 ### Copyright (c) 2016-2024, Oscar Lim
-### Copyright (c) 2024, the luasystem project authors.
+### Copyright (c) 2024-2025, the luasystem project authors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
diff --git a/docs/classes/bitflags.html b/docs/classes/bitflags.html
index 4ed5aaf..dc682f2 100644
--- a/docs/classes/bitflags.html
+++ b/docs/classes/bitflags.html
@@ -298,7 +298,7 @@ return <code>false</code> if the flags are checked.
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/compat.lua.html b/docs/examples/compat.lua.html
index b887c91..42928b0 100644
--- a/docs/examples/compat.lua.html
+++ b/docs/examples/compat.lua.html
@@ -112,7 +112,7 @@
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/flag_debugging.lua.html b/docs/examples/flag_debugging.lua.html
index 8fcf0a9..862cd96 100644
--- a/docs/examples/flag_debugging.lua.html
+++ b/docs/examples/flag_debugging.lua.html
@@ -80,7 +80,7 @@
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/password_input.lua.html b/docs/examples/password_input.lua.html
index f29e429..cf27497 100644
--- a/docs/examples/password_input.lua.html
+++ b/docs/examples/password_input.lua.html
@@ -132,7 +132,7 @@ useful for reading secrets from the user.
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/read.lua.html b/docs/examples/read.lua.html
index 1d6bb3e..2ffcf1b 100644
--- a/docs/examples/read.lua.html
+++ b/docs/examples/read.lua.html
@@ -143,7 +143,7 @@ sys.<span class="function-name">setnonblock</span>(<span class="global">io</span
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/readline.lua.html b/docs/examples/readline.lua.html
index a78f5b3..ba453ad 100644
--- a/docs/examples/readline.lua.html
+++ b/docs/examples/readline.lua.html
@@ -213,10 +213,12 @@ readline.__index = readline
 </span><span class="comment">-- @tparam[opt=""] string opts.value the default value
 </span><span class="comment">-- @tparam[opt=<code>#value</code>] number opts.position of the cursor in the input
 </span><span class="comment">-- @tparam[opt={"\10"/"\13"}] table opts.exit_keys an array of keys that will cause the readline to exit
+</span><span class="comment">-- @tparam[opt=system.sleep] function opts.fsleep the sleep function to use (see <a href="../modules/system.html#readansi">system.readansi</a>)
 </span><span class="comment">-- @treturn readline the new readline object
 </span><span class="keyword">function</span> readline.<span class="function-name">new</span>(opts)
   <span class="keyword">local</span> value = <span class="function-name">utf8parse</span>(opts.value <span class="keyword">or</span> <span class="string">""</span>)
   <span class="keyword">local</span> prompt = <span class="function-name">utf8parse</span>(opts.prompt <span class="keyword">or</span> <span class="string">""</span>)
+  <span class="keyword">local</span> fsleep = opts.fsleep <span class="keyword">or</span> sys.sleep
   <span class="keyword">local</span> pos = <span class="global">math</span>.<span class="function-name">floor</span>(opts.position <span class="keyword">or</span> (#value + <span class="number">1</span>))
   pos = <span class="global">math</span>.<span class="function-name">max</span>(<span class="global">math</span>.<span class="function-name">min</span>(pos, (#value + <span class="number">1</span>)), <span class="number">1</span>)
   <span class="keyword">local</span> len = <span class="global">math</span>.<span class="function-name">floor</span>(opts.max_length <span class="keyword">or</span> <span class="number">80</span>)
@@ -244,6 +246,7 @@ readline.__index = readline
 </span>    position = pos,         <span class="comment">-- the current position in the input
 </span>    drawn_before = <span class="keyword">false</span>,   <span class="comment">-- if the prompt has been drawn
 </span>    exit_keys = exit_keys,  <span class="comment">-- the keys that will cause the readline to exit
+</span>    fsleep = fsleep,        <span class="comment">-- the sleep function to use
 </span>  }
 
   <span class="global">setmetatable</span>(self, readline)
@@ -482,7 +485,7 @@ readline.__index = readline
   <span class="keyword">local</span> timeout_end = sys.<span class="function-name">gettime</span>() + timeout
 
   <span class="keyword">while</span> <span class="keyword">true</span> <span class="keyword">do</span>
-    <span class="keyword">local</span> key, keytype = sys.<span class="function-name">readansi</span>(timeout_end - sys.<span class="function-name">gettime</span>())
+    <span class="keyword">local</span> key, keytype = sys.<span class="function-name">readansi</span>(timeout_end - sys.<span class="function-name">gettime</span>(), self.fsleep)
     <span class="keyword">if</span> <span class="keyword">not</span> key <span class="keyword">then</span>
       <span class="comment">-- error or timeout
 </span>      <span class="keyword">return</span> <span class="keyword">nil</span>, keytype
@@ -527,7 +530,8 @@ sys.<span class="function-name">setconsoleflags</span>(<span class="global">io</
   value = <span class="string">"Hello, 你-好 World 🚀!"</span>,
   <span class="comment">-- position = 2,
 </span>  exit_keys = {key_sequences.enter, <span class="string">"\27"</span>, <span class="string">"\t"</span>, <span class="string">"\27[Z"</span>}, <span class="comment">-- enter, escape, tab, shift-tab
-</span>}
+</span>  fsleep = sys.sleep,
+}
 
 
 <span class="keyword">local</span> result, key = <span class="function-name">rl</span>()
@@ -545,7 +549,7 @@ sys.<span class="function-name">setconsoleflags</span>(<span class="global">io</
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/spinner.lua.html b/docs/examples/spinner.lua.html
index b56f1ed..ea992e3 100644
--- a/docs/examples/spinner.lua.html
+++ b/docs/examples/spinner.lua.html
@@ -137,7 +137,7 @@ sys.<span class="function-name">setnonblock</span>(<span class="global">io</span
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/spiral_snake.lua.html b/docs/examples/spiral_snake.lua.html
index 961f506..1f0d582 100644
--- a/docs/examples/spiral_snake.lua.html
+++ b/docs/examples/spiral_snake.lua.html
@@ -145,7 +145,7 @@ codes for moving the cursor around.
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/examples/terminalsize.lua.html b/docs/examples/terminalsize.lua.html
index c01a3d3..a8bb42b 100644
--- a/docs/examples/terminalsize.lua.html
+++ b/docs/examples/terminalsize.lua.html
@@ -110,7 +110,7 @@ sys.<span class="function-name">tcsetattr</span>(<span class="global">io</span>.
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/index.html b/docs/index.html
index 1ddd617..9ca0c42 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -142,7 +142,7 @@
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/modules/system.html b/docs/modules/system.html
index ec077d8..093fd8b 100644
--- a/docs/modules/system.html
+++ b/docs/modules/system.html
@@ -152,12 +152,12 @@
         <td class="summary">Debug function for terminal flags (Posix).</td>
         </tr>
         <tr>
-        <td class="name" nowrap><a href="#readansi">readansi (timeout)</a></td>
+        <td class="name" nowrap><a href="#readansi">readansi (timeout[, fsleep=system.sleep])</a></td>
         <td class="summary">Reads a single key, if it is the start of ansi escape sequence then it reads
  the full sequence.</td>
         </tr>
         <tr>
-        <td class="name" nowrap><a href="#readkey">readkey (timeout)</a></td>
+        <td class="name" nowrap><a href="#readkey">readkey (timeout[, fsleep=system.sleep])</a></td>
         <td class="summary">Reads a single byte from the console, with a timeout.</td>
         </tr>
         <tr>
@@ -353,7 +353,8 @@ Windows, setting an empty string, will also delete the variable)
     </dt>
     <dd>
     Generate random bytes.
-This uses <code>CryptGenRandom()</code> on Windows, and <code>/dev/urandom</code> on other platforms. It will return the
+This uses <code>BCryptGenRandom()</code> on Windows, <code>getrandom()</code> on Linux, <code>arc4random_buf</code> on BSD,
+and <code>/dev/urandom</code> on other platforms. It will return the
 requested number of bytes, or an error, never a partial result.
 
 
@@ -728,12 +729,12 @@ system.<span class="function-name">listconsoleflags</span>(<span class="global">
 </dd>
     <dt>
     <a name = "readansi"></a>
-    <strong>readansi (timeout)</strong>
+    <strong>readansi (timeout[, fsleep=system.sleep])</strong>
     </dt>
     <dd>
     Reads a single key, if it is the start of ansi escape sequence then it reads
  the full sequence.  The key can be a multi-byte string in case of multibyte UTF-8 character.
- This function uses <a href="../modules/system.html#readkey">system.readkey</a>, and hence <a href="../modules/system.html#sleep">system.sleep</a> to wait until either a key is
+ This function uses <a href="../modules/system.html#readkey">system.readkey</a>, and hence <code>fsleep</code> to wait until either a key is
  available or the timeout is reached.
  It returns immediately if a key is available or if <code>timeout</code> is less than or equal to <code>0</code>.
  In case of an ANSI sequence, it will return the full sequence as a string.
@@ -745,6 +746,11 @@ system.<span class="function-name">listconsoleflags</span>(<span class="global">
             <span class="types"><span class="type">number</span></span>
          the timeout in seconds.
         </li>
+        <li><span class="parameter">fsleep</span>
+            <span class="types"><span class="type">function</span></span>
+         the function to call for sleeping.
+         (<em>default</em> system.sleep)
+        </li>
     </ul>
 
     <h3>Returns:</h3>
@@ -775,11 +781,11 @@ system.<span class="function-name">listconsoleflags</span>(<span class="global">
 </dd>
     <dt>
     <a name = "readkey"></a>
-    <strong>readkey (timeout)</strong>
+    <strong>readkey (timeout[, fsleep=system.sleep])</strong>
     </dt>
     <dd>
     Reads a single byte from the console, with a timeout.
- This function uses <a href="../modules/system.html#sleep">system.sleep</a> to wait until either a byte is available or the timeout is reached.
+ This function uses <code>fsleep</code> to wait until either a byte is available or the timeout is reached.
  The sleep period is exponentially backing off, starting at 0.0125 seconds, with a maximum of 0.2 seconds.
  It returns immediately if a byte is available or if <code>timeout</code> is less than or equal to <code>0</code>.</p>
 
@@ -793,6 +799,11 @@ system.<span class="function-name">listconsoleflags</span>(<span class="global">
             <span class="types"><span class="type">number</span></span>
          the timeout in seconds.
         </li>
+        <li><span class="parameter">fsleep</span>
+            <span class="types"><span class="type">function</span></span>
+         the function to call for sleeping.
+         (<em>default</em> system.sleep)
+        </li>
     </ul>
 
     <h3>Returns:</h3>
@@ -1261,8 +1272,8 @@ flags for the <code>iflags</code>, <code>oflags</code>, and <code>lflags</code>
     <h3>Parameters:</h3>
     <ul>
         <li><span class="parameter">utf8_char</span>
-            <span class="types"><a class="type" href="https://www.lua.org/manual/5.4/manual.html#6.4">string</a></span>
-         the utf8 character to check, only the width of the first character will be returned
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.4/manual.html#6.4">string</a> or <span class="type">int</span></span>
+         the utf8 character, or unicode codepoint, to check, only the width of the first character will be returned
         </li>
     </ul>
 
@@ -1411,7 +1422,7 @@ This function will sleep, without doing a busy-loop and wasting CPU cycles.
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/topics/01-introduction.md.html b/docs/topics/01-introduction.md.html
index 5b5f07d..cf8a21f 100644
--- a/docs/topics/01-introduction.md.html
+++ b/docs/topics/01-introduction.md.html
@@ -84,7 +84,7 @@ independence.</p>
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/topics/02-development.md.html b/docs/topics/02-development.md.html
index b305201..b9f79fd 100644
--- a/docs/topics/02-development.md.html
+++ b/docs/topics/02-development.md.html
@@ -84,7 +84,7 @@ pass locally, and do not rely on CI only.</p>
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/topics/03-terminal.md.html b/docs/topics/03-terminal.md.html
index 6471a30..8c45d6e 100644
--- a/docs/topics/03-terminal.md.html
+++ b/docs/topics/03-terminal.md.html
@@ -202,10 +202,10 @@ sys.<span class="function-name">tcsetattr</span>(<span class="global">io</span>.
 sys.<span class="function-name">setnonblock</span>(<span class="global">io</span>.stdin, <span class="keyword">true</span>)
 </pre>
 
-<p>Both functions require a timeout to be provided which allows for proper asynchronous
-code to be written. Since the underlying sleep method used is <a href="../modules/system.html#sleep">system.sleep</a>, just patching
-that function with a coroutine based yielding one should be all that is needed to make
-the result work with asynchroneous coroutine schedulers.</p>
+<p>Both <code>readkey</code> and <code>readansi</code> require a timeout to be provided which allows for proper asynchronous
+code to be written. The underlying sleep method to use can be provided, and defaults to <a href="../modules/system.html#sleep">system.sleep</a>.
+Just passing a coroutine enabled sleep method should be all that is needed to make
+the result work with asynchroneous coroutine schedulers. Alternatively just patch <a href="../modules/system.html#sleep">system.sleep</a>.</p>
 
 <h3>3.3.2 Blocking input</h3>
 
@@ -218,7 +218,7 @@ For an example see <a href="../examples/password_input.lua.html"><code>examples/
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/topics/CHANGELOG.md.html b/docs/topics/CHANGELOG.md.html
index 8567695..fd3ba59 100644
--- a/docs/topics/CHANGELOG.md.html
+++ b/docs/topics/CHANGELOG.md.html
@@ -107,6 +107,17 @@
 <p><a name="Version_history"></a></p>
 <h2>Version history</h2>
 
+<h3>unreleased</h3>
+
+<ul>
+    <li>Feat: when detecting character display width, also accept unicode codepoints (integers),
+    since the Lua utf8 library returns codepoints, not strings</li>
+    <li>Feat: allow passing in a sleep function to <code>readkey</code> and <code>readansi</code></li>
+    <li>Fix: NetBSD fix compilation, undeclared directives</li>
+    <li>Refactor: random bytes; remove deprecated API usage on Windows, move to
+    binary api instead of /dev/urandom file on linux and bsd</li>
+</ul>
+
 <h3>version 0.4.5, released 18-Dec-2024</h3>
 
 <ul>
@@ -183,7 +194,7 @@
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/docs/topics/LICENSE.md.html b/docs/topics/LICENSE.md.html
index 1fe8797..bbe229e 100644
--- a/docs/topics/LICENSE.md.html
+++ b/docs/topics/LICENSE.md.html
@@ -69,7 +69,7 @@
 <h1>MIT License</h1>
 
 <h3>Copyright (c) 2016-2024, Oscar Lim</h3>
-<h3>Copyright (c) 2024, the luasystem project authors.</h3>
+<h3>Copyright (c) 2024-2025, the luasystem project authors.</h3>
 
 <p>Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
@@ -94,7 +94,7 @@ SOFTWARE.</p>
 </div> <!-- id="main" -->
 <div id="about">
 <i>generated by <a href="http://github.com/lunarmodules/LDoc">LDoc 1.5.0</a></i>
-<i style="float:right;">Last updated 2024-12-18 02:50:03 </i>
+<i style="float:right;">Last updated 2025-03-02 19:43:40 </i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>
diff --git a/rockspecs/luasystem-0.5.0-1.rockspec b/rockspecs/luasystem-0.5.0-1.rockspec
new file mode 100644
index 0000000..4fc9b5c
--- /dev/null
+++ b/rockspecs/luasystem-0.5.0-1.rockspec
@@ -0,0 +1,85 @@
+local package_name = "luasystem"
+local package_version = "0.5.0"
+local rockspec_revision = "1"
+local github_account_name = "lunarmodules"
+local github_repo_name = "luasystem"
+
+
+package = package_name
+version = package_version.."-"..rockspec_revision
+
+source = {
+  url = "git+https://github.com/"..github_account_name.."/"..github_repo_name..".git",
+  branch = (package_version == "scm") and "master" or nil,
+  tag = (package_version ~= "scm") and "v"..package_version or nil,
+}
+
+description = {
+  summary = 'Platform independent system calls for Lua.',
+  detailed = [[
+    Adds a Lua API for making platform independent system calls.
+  ]],
+  license = 'MIT <http://opensource.org/licenses/MIT>',
+  homepage = "https://github.com/"..github_account_name.."/"..github_repo_name,
+}
+
+dependencies = {
+  'lua >= 5.1',
+}
+
+local function make_platform(plat)
+  local defines = {
+    linux = { },
+    unix = { },
+    macosx = { },
+    win32 = { "WINVER=0x0600", "_WIN32_WINNT=0x0600" },
+    mingw32 = { "WINVER=0x0600", "_WIN32_WINNT=0x0600" },
+  }
+  local libraries = {
+    linux = { "rt" },
+    unix = { },
+    macosx = { },
+    win32 = { "advapi32", "winmm", "bcrypt" },
+    mingw32 = { },
+  }
+  local libdirs = {
+    linux = nil,
+    unix = nil,
+    macosx = nil,
+    win32 = nil,
+    mingw32 = { },
+  }
+  return {
+    modules = {
+      ['system.core'] = {
+        sources = {
+          'src/core.c',
+          'src/compat.c',
+          'src/time.c',
+          'src/environment.c',
+          'src/random.c',
+          'src/term.c',
+          'src/bitflags.c',
+          'src/wcwidth.c',
+        },
+        defines = defines[plat],
+        libraries = libraries[plat],
+        libdirs = libdirs[plat],
+      },
+    },
+  }
+end
+
+build = {
+  type = 'builtin',
+  platforms = {
+    linux = make_platform('linux'),
+    unix = make_platform('unix'),
+    macosx = make_platform('macosx'),
+    win32 = make_platform('win32'),
+    mingw32 = make_platform('mingw32'),
+  },
+  modules = {
+    ['system.init'] = 'system/init.lua',
+  },
+}
diff --git a/src/core.c b/src/core.c
index 06ae3e1..4eaa448 100644
--- a/src/core.c
+++ b/src/core.c
@@ -4,7 +4,7 @@
 #include <lua.h>
 #include <lauxlib.h>
 
-#define LUASYSTEM_VERSION   "LuaSystem 0.4.5"
+#define LUASYSTEM_VERSION   "LuaSystem 0.5.0"
 
 #ifdef _WIN32
 #define LUAEXPORT __declspec(dllexport)