diff --git a/.cirrus.yml b/.cirrus.yml
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -64,6 +64,14 @@
   # Check that includes/Makefile refers to existing directories
   - if ! make -C include/ check-ldirs; then printf "\n>>> include/Makefile lists nonexistant directories <<<\n"; false; fi
 
+  makeman_script:
+  # Check that the committed src.conf.5 matches the one generated by
+  # tools/build/options/makeman (modulo the date which always updates)
+  # XXX: This script is slow so keep it last
+  - (make makeman 2> /tmp/makeman.out); cat /tmp/makeman.out
+  - if ! git diff --exit-code --ignore-matching-lines "^.Dd" share/man/man5/src.conf.5; then printf "\n>>> src.conf.5 was not updated as required <<<\n"; false; fi
+  - if grep -q "no description found" /tmp/makeman.out; then printf "\n>>> Missing description files <<<\n"; false; fi
+
   post_script:
   - df -m
   - du -m -s /usr/obj