envsubst < templates/header.html > $@; \
envsubst < templates/index_header.html >> $@; \
envsubst < templates/tag_list_header.html >> $@; \
envsubst < templates/header.html > $@; \
envsubst < templates/index_header.html >> $@; \
envsubst < templates/tag_list_header.html >> $@; \