diff --git a/guix-data-service/web/server.scm b/guix-data-service/web/server.scm
index 38e219b..fdde10c 100644
--- a/guix-data-service/web/server.scm
+++ b/guix-data-service/web/server.scm
@@ -105,6 +105,8 @@
 
   (%guix-data-service-metrics-registry registry)
 
+  (fluid-set! %file-port-name-canonicalization 'none)
+
   (with-exception-handler
       (lambda (exn)
         (simple-format #t "failed enabling core dumps: ~A\n" exn))