diff --git a/package b/package
index 64c88c4..cac8fd0 100755
--- a/package
+++ b/package
@@ -41,7 +41,7 @@ def build_image(build_workspace, base_image, profile_name, profile, debug=False,
     # Run hooks
     tamarin.run_profile_hooks(profile, 'containerbuild', cwd=build_workspace, env=hooks_env, debug=debug)
 
-    image_tag = "tamarin:{:s}_{:s}_{:d}".format(profile_name, base_image.replace(':', '_'), os.getpid())
+    image_tag = "tamarin:{:s}_{:s}_{:d}".format(profile_name, base_image.replace(':', '_').replace('/', '_'), os.getpid())
 
     build_args = [ "build", "-t", image_tag ]