diff --git a/xos/configurations/devel/Makefile b/xos/configurations/devel/Makefile
index fce6ab6..2cbc1d0 100644
--- a/xos/configurations/devel/Makefile
+++ b/xos/configurations/devel/Makefile
@@ -5,7 +5,7 @@
 test: common_cloudlab
 	echo "# Autogenerated -- do not edit" > Dockerfile
 	cat ../common/Dockerfile.common Dockerfile.devel >> Dockerfile
-	cd ../../..; sudo docker build  -t xos -f xos/configurations/devel/Dockerfile .
+	cd ../../..; sudo docker build --no-cache -t xos -f xos/configurations/devel/Dockerfile .
 	sudo docker run -d --add-host="ctl:$(MYIP)" -p 9999:8000 xos
 	bash ../common/wait_for_xos.sh
 
diff --git a/xos/helloworldservice/admin.py b/xos/helloworldservice/admin.py
index 3e67855..b77cc40 100644
--- a/xos/helloworldservice/admin.py
+++ b/xos/helloworldservice/admin.py
@@ -12,7 +12,7 @@
 from suit.widgets import LinkedSelect
 from core.admin import ServiceAppAdmin,SliceInline,ServiceAttrAsTabInline, ReadOnlyAwareAdmin, XOSTabularInline, ServicePrivilegeInline, TenantRootTenantInline, TenantRootPrivilegeInline
 from core.middleware import get_request
-
+from core.models import User
 from functools import update_wrapper
 from django.contrib.admin.views.main import ChangeList
 from django.core.urlresolvers import reverse