From c2cf696430055498467dd9deec59939e8d52a43e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Sun, 16 Jul 2017 18:28:02 +0100
Subject: [PATCH] nixos/agetty: override upstream default

Since systemd 234 we keep default value for ExecStart in the upstream service file.
Therefor we need to override it in our module.
---
 nixos/modules/services/ttys/agetty.nix | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/services/ttys/agetty.nix b/nixos/modules/services/ttys/agetty.nix
index 051d54e932fb..f8dd75ea2c46 100644
--- a/nixos/modules/services/ttys/agetty.nix
+++ b/nixos/modules/services/ttys/agetty.nix
@@ -68,14 +68,19 @@ in
     services.mingetty.greetingLine = mkDefault ''<<< Welcome to NixOS ${config.system.nixosLabel} (\m) - \l >>>'';
 
     systemd.services."getty@" =
-      { serviceConfig.ExecStart = gettyCmd "--noclear --keep-baud %I 115200,38400,9600 $TERM";
+      { serviceConfig.ExecStart = [
+          "" # override upstream default with an empty ExecStart
+          (gettyCmd "--noclear --keep-baud %I 115200,38400,9600 $TERM")
+        ];
         restartIfChanged = false;
       };
 
     systemd.services."serial-getty@" =
-      { serviceConfig.ExecStart =
-          let speeds = concatStringsSep "," (map toString config.services.mingetty.serialSpeed);
-          in gettyCmd "%I ${speeds} $TERM";
+      let speeds = concatStringsSep "," (map toString config.services.mingetty.serialSpeed); in
+      { serviceConfig.ExecStart = [
+          "" # override upstream default with an empty ExecStart
+          (gettyCmd "%I ${speeds} $TERM")
+        ];
         restartIfChanged = false;
       };