diff --git a/hosts/jabber/default.nix b/hosts/jabber/default.nix
index fbe914c6..623aba2f 100644
--- a/hosts/jabber/default.nix
+++ b/hosts/jabber/default.nix
@@ -61,7 +61,7 @@ in
     backup.paths = [ "/var/lib/prosody/" ];
 
     collectd.plugins.exec = ''
-      Exec "${config.services.collectd.user}" "${pkgs.ruby}/bin/ruby" "${./prosody-stats.rb}"
+      Exec "${config.services.collectd.user}" "${lib.getExe pkgs.ruby}" "${./prosody-stats.rb}"
     '';
 
     coturn = {