--- a/PKGBUILD	2013-11-14 07:06:31.000000000 +0800
+++ b/PKGBUILD	2013-11-14 16:01:15.637511611 +0800
@@ -6,7 +6,7 @@
 pkgbase=python-numpy
 pkgname=('python2-numpy' 'python-numpy')
 pkgver=1.7.1
-pkgrel=3
+pkgrel=4
 pkgdesc="Scientific tools for Python"
 arch=('i686' 'x86_64')
 license=('custom')
@@ -16,10 +16,17 @@
 source=(http://downloads.sourceforge.net/numpy/numpy-${pkgver}.tar.gz)
 md5sums=('0ab72b3b83528a7ae79c6df9042d61c6')
 
-build() {
-  cd "${srcdir}"
+prepare() {
   cp -a numpy-${pkgver} numpy-py2-${pkgver}
 
+  cd "${srcdir}/numpy-py2-${pkgver}"
+  sed -i -e "s|#![ ]*/usr/bin/python$|#!/usr/bin/python2|" \
+         -e "s|#![ ]*/usr/bin/env python$|#!/usr/bin/env python2|" \
+         -e "s|#![ ]*/bin/env python$|#!/usr/bin/env python2|" \
+         $(find . -name '*.py')
+}
+
+build() {
   export ATLAS=None
   export LDFLAGS="$LDFLAGS -shared"
 
@@ -47,11 +54,6 @@
   install -m755 -d "${pkgdir}/usr/share/licenses/python2-numpy"
   install -m644 LICENSE.txt "${pkgdir}/usr/share/licenses/python2-numpy/"
 
-  sed -i -e "s|#![ ]*/usr/bin/python$|#!/usr/bin/python2|" \
-         -e "s|#![ ]*/usr/bin/env python$|#!/usr/bin/env python2|" \
-         -e "s|#![ ]*/bin/env python$|#!/usr/bin/env python2|" \
-             $(find ${pkgdir} -name '*.py')
-
   install -m755 -d "${pkgdir}/usr/include/python${_pyver}"
   ln -sf /usr/lib/python${_pyver}/site-packages/numpy/core/include/numpy "${pkgdir}/usr/include/python${_pyver}/numpy"
 }