diff --git a/make-includes/build_lecture_rules.make b/make-includes/build_lecture_rules.make
index 9f30439..4d3cce6 100755
--- a/make-includes/build_lecture_rules.make
+++ b/make-includes/build_lecture_rules.make
@@ -258,7 +258,7 @@
 	@$(TEST) -d $(HANDBOOK_INSTALL_ROOT)
 	@$(MKDIR_P) $(INSTALL_DIRECTORY)
 	@$(FIND) $(INSTALL_DIRECTORY) -type l -delete
-	@$(foreach f,$(INSTALL_FILES),if $(TEST) ! -f $(INSTALL_DIRECTORY)/$(f) -o $(CURDIR)/$(f) -nt $(INSTALL_DIRECTORY)/$(f); then $(ECHO) "Linking $(f)"; $(LN_S) -f $(CURDIR)/$(f) $(INSTALL_DIRECTORY); fi;)
+	@$(foreach f,$(INSTALL_FILES),if $(TEST) -f $(CURDIR)/$(f); then $(ECHO) "Linking $(f)"; $(LN_S) -f $(CURDIR)/$(f) $(INSTALL_DIRECTORY); fi;)
 	@$(ANNOUNCE) "Synchronising with Blackboard"
 	@$(SITECOPY) --update Blackboard$(PAPER_NUMBER)