Index: mongodb-2.4.6.ebuild
===================================================================
RCS file: /var/cvsroot/gentoo-x86/dev-db/mongodb/mongodb-2.4.6.ebuild,v
retrieving revision 1.1
diff -u -B -r1.1 mongodb-2.4.6.ebuild
--- mongodb-2.4.6.ebuild	21 Aug 2013 12:41:54 -0000	1.1
+++ mongodb-2.4.6.ebuild	23 Aug 2013 08:03:56 -0000
@@ -47,6 +47,11 @@
 	scons_opts+=" --use-system-snappy"
 	scons_opts+=" --use-system-boost"
 
+	if use prefix; then
+		scons_opts+=" --cpppath=${EPREFIX}/usr/include"
+		scons_opts+=" --libpath=${EPREFIX}/usr/$(get_libdir)"
+	fi
+
 	if use kerberos; then
 		scons_opts+=" --use-sasl-client"
 	fi