diff --git a/justfile b/justfile
index acebe82..1f7af88 100644
--- a/justfile
+++ b/justfile
@@ -26,12 +26,13 @@ html:
 # build rss
 rss:
   #!/usr/bin/env sh
-  echo "<rss version=\"2.0\"><channel><title>list blog</title>" > www/feed.xml
-  echo "<link>http://tilde.town/~dozens/listblog/index.html</link><description>a blog that is just a bunch of lists</description><atom:link rel=\"self\" type=\"application/rss+xml\" href=\"http://tilde.town/~dozens/listblog/episodes.xml\"/>" >> www/feed.xml
+  exec > www/feed.xml
+  echo "<rss version=\"2.0\"><channel><title>list blog</title>"
+  echo "<link>http://tilde.town/~dozens/listblog/index.html</link><description>a blog that is just a bunch of lists</description><atom:link rel=\"self\" type=\"application/rss+xml\" href=\"http://tilde.town/~dozens/listblog/episodes.xml\"/>"
   for f in `ls src/*.md`; do
-    ed -s $f < commands.ed | recfmt -f templates/template.recfmt | m4 >> www/feed.xml
+    ed -s $f < commands.ed | recfmt -f templates/template.recfmt | m4
   done
-  echo '</channel></rss>' >> www/feed.xml
+  echo '</channel></rss>'
 
 # make html and rss
 build: index html rss