diff --git a/python3.12-setuptools.spec b/python3.12-setuptools.spec
index 18c1220..5663443 100644
--- a/python3.12-setuptools.spec
+++ b/python3.12-setuptools.spec
@@ -3,6 +3,11 @@
 
 %global srcname setuptools
 
+# Workaround for https://issues.redhat.com/browse/CS-1907
+# By defining the %%{__bootstrap} value,
+# we prevent misconfigured Koji putting a literal %%{__bootstrap} in %%dist.
+%{!?__bootstrap:%global __bootstrap %{nil}}
+
 # used when bootstrapping new Python versions
 %bcond_without bootstrap