diff --git a/dev-games/box2d/box2d-2.3.1.recipe b/dev-games/box2d/box2d-2.3.1.recipe
index 6bddd8b9c..289b2d4df 100644
--- a/dev-games/box2d/box2d-2.3.1.recipe
+++ b/dev-games/box2d/box2d-2.3.1.recipe
@@ -5,12 +5,12 @@ winner of the 2008 Independant Game Festival Grand Prize"
 HOMEPAGE="http://www.box2d.org"
 COPYRIGHT="2007-2015 Erin Catto"
 LICENSE="MIT"
-REVISION="3"
-SOURCE_URI="https://github.com/erincatto/Box2D/archive/v2.3.1.zip"
+REVISION="4"
+SOURCE_URI="https://github.com/erincatto/Box2D/archive/v$portVersion.zip"
 CHECKSUM_SHA256="1f04be518804a9879281a105a3c1511840371c96194b156eea5ad040d2805b46"
-SOURCE_DIR="Box2D-2.3.1"
+SOURCE_DIR="Box2D-$portVersion"
 
-ARCHITECTURES="x86_gcc2 ?x86 ?x86_64"
+ARCHITECTURES="x86_gcc2 ?x86 x86_64"
 SECONDARY_ARCHITECTURES="x86"
 
 PROVIDES="
@@ -43,7 +43,8 @@ BUILD_PREREQUIRES="
 BUILD()
 {
 	cd Box2D
-	cmake . -DBOX2D_INCLUDE_DIR=$includeDir -DBOX2D_LIBRARY_DIRS=$libDir \
+	cmake . -DCMAKE_INSTALL_PREFIX=$prefix \
+		-DBOX2D_INCLUDE_DIR=$includeDir -DBOX2D_LIBRARY_DIRS=$libDir \
 		-DBOX2D_BUILD_EXAMPLES=Off -DBOX2D_BUILD_SHARED=On
 	make $jobArgs
 }
@@ -53,6 +54,9 @@ INSTALL()
 	cd Box2D
 	make install
 
+	mkdir -p $(dirname $includeDir)
+	mv $prefix/include $includeDir
+
 	prepareInstalledDevelLib libBox2D
-	packageEntries devel $developDir
+	packageEntries devel $developDir $libDir/cmake
 }