diff --git a/doc/manual/local.mk b/doc/manual/local.mk
index fdcd131de..7639f510a 100644
--- a/doc/manual/local.mk
+++ b/doc/manual/local.mk
@@ -108,7 +108,10 @@ doc/manual/generated/man1/nix3-manpages: $(d)/src/command-ref/new-cli
 $(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/anchors.jq $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/command-ref/conf-file.md $(d)/src/language/builtins.md
 	$(trace-gen) \
 	  set -euo pipefail; \
-	  RUST_LOG=warn mdbook build doc/manual -d $(DESTDIR)$(docdir)/manual 2>&1 \
+	  RUST_LOG=warn mdbook build doc/manual -d $(DESTDIR)$(docdir)/manual.tmp 2>&1 \
 		  | { grep -Fv "because fragment resolution isn't implemented" || :; }
+	@rm -rf $(DESTDIR)$(docdir)/manual
+	@mv $(DESTDIR)$(docdir)/manual.tmp/html $(DESTDIR)$(docdir)/manual
+	@rm -rf $(DESTDIR)$(docdir)/manual.tmp
 
 endif