diff --git a/community/supercollider/PKGBUILD b/community/supercollider/PKGBUILD
index b03a916ce..153ed961f 100644
--- a/community/supercollider/PKGBUILD
+++ b/community/supercollider/PKGBUILD
@@ -1,4 +1,3 @@
-# $Id$
 # Maintainer: David Runge <dave@sleepmap.de>
 # Contributor: speps <speps at aur dot archlinux dot org>
 # Contributor: osc <farid at archlinux-br.org>
@@ -9,7 +8,7 @@
 _name=SuperCollider
 pkgname=supercollider
 pkgver=3.9.3
-pkgrel=3
+pkgrel=4
 pkgdesc="Environment and programming language for real time audio synthesis and algorithmic composition"
 arch=('x86_64')
 url="https://supercollider.github.io"
@@ -32,6 +31,8 @@ prepare() {
   patch -Np1 -i ../boost-1.67.patch
   # requires out-of-tree build
   mkdir -v bld
+  # make sure the system boost headers are used
+  rm -r external_libraries/boost
 }
 
 build() {