diff --git a/modules/nixos/hydra.nix b/modules/nixos/hydra.nix
index c890f7f..3f81209 100644
--- a/modules/nixos/hydra.nix
+++ b/modules/nixos/hydra.nix
@@ -47,9 +47,10 @@ in
     # remote builders set in /etc/nix/machines + localhost
     buildMachinesFiles = [
       (pkgs.runCommand "etc-nix-machines" { machines = config.environment.etc."nix/machines".text; } ''
-        printf "$machines" | grep build04 > $out
+        printf "$machines" > $out
         substituteInPlace $out --replace-fail 'ssh-ng://' 'ssh://'
         substituteInPlace $out --replace-fail ' 80 ' ' 3 '
+        substituteInPlace $out --replace-fail ' 8 ' ' 1 '
       '')
 
       (pkgs.writeText "local" ''