Use os.path.join rather than /.

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@76851 62d5b8a3-27da-0310-9561-8e5933582275

dev.py

@@ -41,4 +41,6 @@ pkg_resources.working_set.add_entry('src')
 import zc.buildout.easy_install
 zc.buildout.easy_install.scripts(
     ['zc.buildout'], pkg_resources.working_set , sys.executable, 'bin')
-sys.exit(os.spawnl(os.P_WAIT, 'bin/buildout', 'bin/buildout'))
+
+bin_buildout = os.path.join('bin', 'buildout')
+sys.exit(os.spawnl(os.P_WAIT, bin_buildout, bin_buildout))