diff --git a/doc/Makefile b/doc/Makefile
index 7696c642..2a2ef04a 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -11,18 +11,22 @@ FILES	+=	xbps_pkg_files_dictionary.$(FORMAT)
 FILES	+=	xbps_binary_pkg_content.$(FORMAT)
 
 .PHONY: all
-all: $(FILES) doxygendocs
+all: $(FILES) doxyfiletrans doxygendocs
 
 $(FILES): %.$(FORMAT): %.dot
 	dot -T$(FORMAT) $< -o images/$@
 
-doxygendocs: $(FILES)
+doxyfiletrans: $(DOXYF).in
+	sed -e "s|@@PROJECT_NUMBER@@|$$(date +%Y%m%d)|" $< > $(DOXYF)
+
+doxygendocs: $(FILES) doxyfiletrans
 	doxygen $(DOXYF)
 
 .PHONY: clean
 clean:
 	-rm -f images/*.$(FORMAT)
 	-rm -rf ../api
+	-rm -f $(DOXYF)
 
 .PHONY: install
 install:
diff --git a/doc/xbps_api_doxyfile b/doc/xbps_api_doxyfile.in
similarity index 99%
rename from doc/xbps_api_doxyfile
rename to doc/xbps_api_doxyfile.in
index afd2de6b..2f495653 100644
--- a/doc/xbps_api_doxyfile
+++ b/doc/xbps_api_doxyfile.in
@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "XBPS Library API"
-PROJECT_NUMBER         = 20110126
+PROJECT_NUMBER         = @@PROJECT_NUMBER@@
 PROJECT_BRIEF          = "The X Binary Package System"
 PROJECT_LOGO           = xbps-logo.png
 OUTPUT_DIRECTORY       = ../api
@@ -133,7 +133,7 @@ STRIP_CODE_COMMENTS    = NO
 REFERENCED_BY_RELATION = YES
 REFERENCES_RELATION    = YES
 REFERENCES_LINK_SOURCE = YES
-USE_HTAGS              = YES
+USE_HTAGS              = NO
 VERBATIM_HEADERS       = NO
 #---------------------------------------------------------------------------
 # configuration options related to the alphabetical class index