box2d: use stdenv

This replaces use of `builderDefsPackage`. Also change to download
tarball from GitHub as it is the new upstream home.

pkgs/development/libraries/box2d/default.nix

@@ -1,51 +1,33 @@
-x@{builderDefsPackage
-  , unzip, cmake, mesa, freeglut, libX11, xproto
-  , inputproto, libXi, fetchsvn, pkgconfig
-  , ...}:
-builderDefsPackage
-(a :
-let
-  helperArgNames = ["stdenv" "fetchsvn" "builderDefsPackage"] ++
-    [];
+{ stdenv, fetchurl, unzip, cmake, mesa, freeglut, libX11, xproto, inputproto
+, libXi, pkgconfig }:
 
-  buildInputs = map (n: builtins.getAttr n x)
-    (builtins.attrNames (builtins.removeAttrs x helperArgNames));
-in
-rec {
-  version = "2.3.0";
+stdenv.mkDerivation rec {
   name = "box2d-${version}";
-  srcDrv = a.fetchsvn {
-    url = "http://box2d.googlecode.com/svn/trunk";
-    rev = "277";
-    sha256 = "1xp93yw2zcqhmh999v7cwqaqxq1glgyg5r8kfm4yabc1ypba3in4";
+  version = "2.3.0";
+
+  src = fetchurl {
+    url = "https://github.com/erincatto/Box2D/archive/v${version}.tar.gz";
+    sha256 = "1dmbswh4x2n5l3c9h0k72m0z4rdpzfy1xl8m8p3rf5rwkvk3bkg2";
   };
-  src = srcDrv + "/";
 
-  inherit buildInputs;
+  sourceRoot = "Box2D-${version}/Box2D";
 
-  phaseNames = ["changeSettings" "doCmake" "doMakeInstall"];
-
-  changeSettings = a.fullDepEntry ''
-    sed -i Box2D/Common/b2Settings.h -e 's@b2_maxPolygonVertices .*@b2_maxPolygonVertices 15@'
-  '' ["minInit" "addInputs" "doUnpack"];
-      
-  goSrcDir = ''cd Box2D'';
-
-  doCmake = a.fullDepEntry ''
-    cd Build; 
-    cmake -DBOX2D_INSTALL=ON -DBOX2D_BUILD_SHARED=ON -DCMAKE_INSTALL_PREFIX=$out ..
-  '' ["minInit" "addInputs" "doUnpack"];
-      
-  meta = {
-    description = "2D physics engine";
-    maintainers = with a.lib.maintainers;
-    [
-      raskin
+  buildInputs = [
+    unzip cmake mesa freeglut libX11 xproto inputproto libXi pkgconfig
   ];
-    platforms = with a.lib.platforms;
-      linux;
-    license = "bsd";
-    inherit version;
-  };
-}) x
 
+  cmakeFlags = [ "-DBOX2D_INSTALL=ON" "-DBOX2D_BUILD_SHARED=ON" ];
+
+  prePatch = ''
+    substituteInPlace Box2D/Common/b2Settings.h \
+      --replace 'b2_maxPolygonVertices	8' 'b2_maxPolygonVertices	15'
+  '';
+
+  meta = with stdenv.lib; {
+    description = "2D physics engine";
+    homepage = http://box2d.org/;
+    maintainers = [ maintainers.raskin ];
+    platforms = platforms.linux;
+    license = licenses.zlib;
+  };
+}