diff --git a/.changeset/unlucky-peas-nail.md b/.changeset/unlucky-peas-nail.md
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+++ b/.changeset/unlucky-peas-nail.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-backend': patch
+---
+
+Keep the empty string as empty string in `input` rather than replacing with `undefined` to make empty values ok for `cookiecutter`