diff --git a/hydra/nginx/hydra.gnu.org-locations.conf b/hydra/nginx/hydra.gnu.org-locations.conf
index eb1a61f..c850b74 100644
--- a/hydra/nginx/hydra.gnu.org-locations.conf
+++ b/hydra/nginx/hydra.gnu.org-locations.conf
@@ -11,6 +11,13 @@ location /api {
     proxy_pass http://127.0.0.1:3000;
 }
 
+# FIXME: The "nix-store --dump …/texlive-texmf | bzip2" processes
+# rarely complete, so skip them for now.
+location ~ ^/nar/.*-(texlive-texmf-|texlive-20150523-texmf) {
+    return 503;
+    break;
+}
+
 location /nar/ {
     proxy_pass http://127.0.0.1:3000;