diff -Nru cython-0.29.28/debian/changelog cython-0.29.28/debian/changelog
--- cython-0.29.28/debian/changelog	2022-03-16 23:48:27.000000000 +0000
+++ cython-0.29.28/debian/changelog	2022-03-17 19:07:30.000000000 +0000
@@ -1,3 +1,9 @@
+cython (0.29.28-1ubuntu3) jammy; urgency=medium
+
+  * Fix cython3-dbg installation for Python 3.10
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Thu, 17 Mar 2022 19:07:30 +0000
+
 cython (0.29.28-1ubuntu2) jammy; urgency=medium
 
   * No-change rebuild with Python 3.10 only
diff -Nru cython-0.29.28/debian/cython3-dbg.install cython-0.29.28/debian/cython3-dbg.install
--- cython-0.29.28/debian/cython3-dbg.install	2022-02-23 12:31:37.000000000 +0000
+++ cython-0.29.28/debian/cython3-dbg.install	2022-03-17 18:03:23.000000000 +0000
@@ -1 +1 @@
-usr/lib/python3*/*-packages/*/*/*.cpython-3?d*.so
+usr/lib/python3*/*-packages/*/*/*.cpython-3*d*.so
diff -Nru cython-0.29.28/debian/rules cython-0.29.28/debian/rules
--- cython-0.29.28/debian/rules	2022-02-23 12:31:37.000000000 +0000
+++ cython-0.29.28/debian/rules	2022-03-17 18:03:46.000000000 +0000
@@ -68,7 +68,7 @@
 	sed -i -e '1 s,#!.*python.*,#!/usr/bin/python3,' debian/cython3/usr/bin/*
 
 	: # remove files installed from cython.install that belong in -dbg
-	find $(CURDIR)/debian/cython3/ -name "*.cpython-3?d*.so" -delete
+	find $(CURDIR)/debian/cython3/ -name "*.cpython-3*d*.so" -delete
 
 	: # share -dbg and normal package doc dirs
 	rm -rf debian/cython3-dbg/usr/share/doc/cython3-dbg