First emerging calculate-install without USE=pxe

pym/cl_assemble.py

@@ -720,7 +720,7 @@ class cl_assemble(color_print):
             self.printMessageForTest(
                 _("Enabling calculate-install to configure packages"))
             if "calculate" in self.clVars.Get('os_assemble_system_profile'):
-                self.runChroot("USE='minimal' emerge "
+                self.runChroot("USE='minimal -pxe' emerge "
                                'sys-apps/calculate-install')
                 self.runChroot("cl-install --install")
             else: