diff --git a/develop/mapnik/mapnik.conf b/develop/mapnik/mapnik.conf
index 5d9645a5a..c39af0492 100644
--- a/develop/mapnik/mapnik.conf
+++ b/develop/mapnik/mapnik.conf
@@ -14,8 +14,22 @@
 
 makeopt=
 makeinstopt=
-hook_add inmake 5 "scons $sconsopt prefix=/$prefix; scons prefix=/$prefix install"
+hook_add inmake 5 "scons $sconsopt PREFIX=/$prefix; scons PREFIX=/$prefix install"
 
 for x in thread filesystem regex serialization; do
 	var_append extraconfopt ' ' "--with-boost-$x=boost_${x}-mt"
 done
+
+fix_sconstructlib() {
+	local x
+
+	if [[ "$libdir" != */lib ]]; then
+		x='lib64'
+	else
+		x='lib'
+	fi
+
+	sed -i -e "s,LIBDIR_SCHEMA=.*$,LIBDIR_SCHEMA= '$x',g" SConstruct
+}
+
+hook_add premake 3 fix_sconstructlib