From 0b34eb149334a4b22f1d2a345f783484e7ae177d Mon Sep 17 00:00:00 2001
From: wmertens <Wout.Mertens@gmail.com>
Date: Sat, 15 Nov 2014 00:14:26 +0100
Subject: [PATCH] Allow starting a shell on stage 1 failure
When people copy the ISO to USB it can happen that the root device isn't known. Having a shell greatly improves that situation.
---
nixos/modules/installer/cd-dvd/iso-image.nix | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/nixos/modules/installer/cd-dvd/iso-image.nix b/nixos/modules/installer/cd-dvd/iso-image.nix
index 22f31c46080..84de7800c2a 100644
--- a/nixos/modules/installer/cd-dvd/iso-image.nix
+++ b/nixos/modules/installer/cd-dvd/iso-image.nix
@@ -176,7 +176,10 @@ in
# UUID of the USB stick. It would be nicer to write
# `root=/dev/disk/by-label/...' here, but UNetbootin doesn't
# recognise that.
- boot.kernelParams = [ "root=LABEL=${config.isoImage.volumeID}" ];
+ boot.kernelParams =
+ [ "root=LABEL=${config.isoImage.volumeID}"
+ "boot.shell_on_fail"
+ ];
fileSystems."/" =
{ fsType = "tmpfs";