--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [project]
 name = "linuxnamespaces"
+version = "0.0.1"
 description = "typed syscall wrappers and plumbing for working with Linux namespaces"
 authors = [{name = "Helmut Grohne", email = "helmut@subdivi.de"}]
 classifiers = [
@@ -27,3 +28,6 @@ strict = true
 
 [tool.pylint]
 max-line-length=79
+
+[tool.setuptools] # needed on bookworm
+packages = ['linuxnamespaces']
