diff --git a/twisted/Pkgfile b/twisted/Pkgfile
index 674178a16..683e31537 100644
--- a/twisted/Pkgfile
+++ b/twisted/Pkgfile
@@ -11,7 +11,7 @@ source=(http://pypi.python.org/packages/source/T/Twisted/Twisted-$version.tar.bz
 
 build() {
 	cd Twisted-$version
-	python setup.py install --root=$PKG
+	/usr/bin/python setup.py install --root=$PKG
 
 	find $PKG \
 		-name README -o \