debian/changelog

+xserver-xorg-video-tdfx (1:1.5.0-2) unstable; urgency=medium
+
+  * rules: Restore xsf to dh. (Closes: #940909)
+
+ -- Timo Aaltonen <tjaalton@debian.org>  Sun, 22 Sep 2019 13:18:13 +0300
+
 xserver-xorg-video-tdfx (1:1.5.0-1) unstable; urgency=medium
 
   * New upstream release.

debian/rules

@@ -22,4 +22,4 @@ override_dh_shlibdeps:
 	dh_shlibdeps -- --warnings=6
 
 %:
-	dh $@ --with quilt --builddirectory=build/
+	dh $@ --with quilt,xsf --builddirectory=build/