diff --git a/docs/Makefile.am b/docs/Makefile.am
index 220df46621..c163172deb 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -16,9 +16,10 @@ OTHER_FILES= \
 GENERATED_FILES = spec.html
 
 spec.html: $(XMLS) $(OTHER_FILES)
-	@install -d docs
 	$(XSLTPROC) $(top_srcdir)/tools/doc-generator.xsl $(top_srcdir)/introspection/all.xml > $@
 
+all: $(GENERATED_FILES)
+
 EXTRA_DIST = $(GENERATED_FILES)
 
 CLEANFILES = $(GENERATED_FILES)