diff --git a/sage-mathematics/trunk/PKGBUILD b/sage-mathematics/trunk/PKGBUILD
index cd7db61..517f8a0 100644
--- a/sage-mathematics/trunk/PKGBUILD
+++ b/sage-mathematics/trunk/PKGBUILD
@@ -83,6 +83,9 @@ package() {
   desktop-file-install ${srcdir}/SAGE-notebook.desktop \
     --dir ${pkgdir}/usr/share/applications 
 
+  # change main binary shebang
+  sed -i 's|#!/usr/bin/env bash|#!/bin/bash|g' ${pkgdir}/opt/sage/sage
+  
   # create link to main binary
   install -d ${pkgdir}/usr/bin
   ln -s /opt/sage/sage ${pkgdir}/usr/bin/sage