-</br>
-<li><a href="http://www.scons.org/">SCons</a> is required for building on
-Windows and optional for Linux (it's an alternative to autoconf/automake.)
+</ul>
+
+<h4>Compiler</h4>
+<p>
+The following compilers are known to work, if you know of others or you're
+willing to maintain support for other compiler get in touch.
+</p>
+
+<ul>
+<li>GCC 4.2.0 or later (some parts of Mesa may require later versions)
+<li>clang - exact minimum requirement is currently unknown.
+<li>Microsoft Visual Studio 2015 or later is required, for building on Windows.
+</ul>
+
+
+<h4>Third party/extra tools.</h4>
+
+<ul>
+<li><a href="https://www.python.org/">Python</a> - Python is required.
+When building with scons 2.7 is required.
+When building with meson 3.5 or newer is required.