diff --git a/changelog.d/9909.feature b/changelog.d/9909.feature
new file mode 100644
index 0000000000..41aba5cca6
--- /dev/null
+++ b/changelog.d/9909.feature
@@ -0,0 +1 @@
+Build Debian packages for Ubuntu 21.04 (Hirsute Hippo).
diff --git a/scripts-dev/build_debian_packages b/scripts-dev/build_debian_packages
index 3bb6e2c7ea..07d018db99 100755
--- a/scripts-dev/build_debian_packages
+++ b/scripts-dev/build_debian_packages
@@ -21,9 +21,10 @@ DISTS = (
     "debian:buster",
     "debian:bullseye",
     "debian:sid",
-    "ubuntu:bionic",
-    "ubuntu:focal",
-    "ubuntu:groovy",
+    "ubuntu:bionic",   # 18.04 LTS (our EOL forced by Py36 on 2021-12-23)
+    "ubuntu:focal",    # 20.04 LTS (our EOL forced by Py38 on 2024-10-14)
+    "ubuntu:groovy",   # 20.10 (EOL 2021-07-07)
+    "ubuntu:hirsute",  # 21.04 (EOL 2022-01-05)
 )
 
 DESC = '''\