Use "nodoc", not "doc", for the name of the tarball w/o docs.
diff --git a/RELEASE_CHECKLIST.txt b/RELEASE_CHECKLIST.txt
index 28f5b89..c803449 100644
--- a/RELEASE_CHECKLIST.txt
+++ b/RELEASE_CHECKLIST.txt
@@ -34,7 +34,7 @@
 tar -czf json-c-${release}.tar.gz -X excludes json-c-${release}
 
 echo doc >> excludes
-tar -czf json-c-${release}-doc.tar.gz -X excludes json-c-${release}
+tar -czf json-c-${release}-nodoc.tar.gz -X excludes json-c-${release}
 
 Tag the branch:
 cd json-c-${release}