diff --git a/sys/unix/Makefile.dat b/sys/unix/Makefile.dat
index 466a14f63..00f604396 100644
--- a/sys/unix/Makefile.dat
+++ b/sys/unix/Makefile.dat
@@ -165,7 +165,11 @@ dungeon: dungeon.def ../util/makedefs ../util/dgn_comp
 	../util/makedefs -e
 	../util/dgn_comp dungeon.pdf
 
-spotless:
+# gitinfo.txt is optionally made by src/Makefile when creating date.h
+clean:
+	-rm -f gitinfo.txt
+
+spotless: clean
 	-rm -f spec_levs quest_levs *.lev $(VARDAT) dungeon dungeon.pdf
 	-rm -f nhdat x11tiles beostiles pet_mark.xbm pilemark.xbm rip.xpm mapbg.xpm
 	-rm -f rip.img GEM_RSC.RSC title.img nh16.img NetHack.ad
diff --git a/sys/unix/Makefile.top b/sys/unix/Makefile.top
index 5aea4e8d6..ad7607cd9 100644
--- a/sys/unix/Makefile.top
+++ b/sys/unix/Makefile.top
@@ -287,6 +287,7 @@ install: rootcheck $(GAME) recover $(VARDAT) dungeon spec_levs
 clean:
 	( cd src ; $(MAKE) clean )
 	( cd util ; $(MAKE) clean )
+	( cd dat ; $(MAKE) clean )
 	( cd doc ; $(MAKE) clean )
 
 # 'make spotless' returns the source tree to near-distribution condition.