Use /run/dnsmasq instead of /var/run/dnsmasq in Debian package.
diff --git a/debian/dnsmasq-base.postrm b/debian/dnsmasq-base.postrm
index 950a9ff..98b10a4 100644
--- a/debian/dnsmasq-base.postrm
+++ b/debian/dnsmasq-base.postrm
@@ -7,5 +7,5 @@
   else
      echo >&2 "not removing dnsmasq system account because deluser command was not found"
   fi
-  rm -rf /var/run/dnsmasq
+  rm -rf /run/dnsmasq
 fi