diff --git a/pyproject.toml b/pyproject.toml
index 2d87e018d..dad6f8053 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ packages = [ # tell poetry build that the repo is named tom_base (which != name,
     { include="tom_observations"},
     { include="tom_setup"},
     { include="tom_targets"},
+    { include="*", format="sdist"},
 ]
 version = "0.0.0"  # version supplied by poetry-dynamic-versioning
 description = "TOM Toolkit and base modules"