diff --git a/rollup/private/rollup.bzl b/rollup/private/rollup.bzl
index 8d1734c..f9540f5 100644
--- a/rollup/private/rollup.bzl
+++ b/rollup/private/rollup.bzl
@@ -147,7 +147,7 @@ def _impl(ctx):
     if ctx.attr.output_dir:
         output_sources.append(ctx.actions.declare_directory(ctx.label.name))
         for entry_point in entry_points:
-            args.add_joined([entry_point[1], entry_point[0]], join_with = "=")
+            args.add_joined([entry_point[1], entry_point[0].short_path], join_with = "=")
         args.add_all(["--output.dir", output_sources[0].short_path])
     else:
         args.add(entry_points[0][0])