diff --git a/apatch b/apatch
index b72540c..995bfc7 100755
--- a/apatch
+++ b/apatch
@@ -44,7 +44,8 @@ abuild clean fetch unpack default_prepare
 startdir="$PWD"
 srcdir="$startdir/src"
 . APKBUILD
-test -n "$builddir" || builddir="$srcdir/$pkgname-$pkgver"
+unset -f grep cut head git rm mv
+[ -n "$builddir" ] || builddir="$srcdir/$pkgname-$pkgver"
 
 patchpath="$startdir/$1"