diff --git a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index ccf41f5f4962..3c2f01c0a5ce 100644
--- a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -13,7 +13,8 @@ buildGoPackage rec {
     sha256 = "1p2j66jzzgyv2w832pw57g02vrac6ldrblqllgwyy0i8krb3ibyz";
   };
 
-  buildInputs = [ systemd makeWrapper ];
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ systemd ];
 
   goDeps = ./postfix-exporter-deps.nix;