Index: dmd/compiler/docs/Makefile
--- dmd/compiler/docs/Makefile.orig
+++ dmd/compiler/docs/Makefile
@@ -4,7 +4,7 @@ DMD_MAN_PAGE=man/man1/dmd.1
 DIFFABLE=0
 
 build: $(GENERATED)/build
-	./$(GENERATED)/build HOST_DMD="$(DMD)" DIFFABLE="$(DIFFABLE)" man
+	./$(GENERATED)/build HOST_DMD="$(HOST_DMD)" DIFFABLE="$(DIFFABLE)" man
 
 preview: $(GENERATED)/docs/$(DMD_MAN_PAGE)
 	man -l $(GENERATED)/docs/$(DMD_MAN_PAGE)
@@ -13,4 +13,4 @@ $(GENERATED)/docs/%: $(GENERATED)/build
 	$(GENERATED)/build $@
 
 $(GENERATED)/build: ../src/build.d
-	$(DMD) -of$@ ../src/build.d
+	$(HOST_DMD) -of$@ ../src/build.d
