From c7aeca1f6e40d072f40bae3c6a2c8473fe8fcc94 Mon Sep 17 00:00:00 2001
From: Mikhail Klementev <jollheef@riseup.net>
Date: Thu, 12 Jul 2018 00:00:58 +0000
Subject: [PATCH] More verbose error

---
 appvm.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/appvm.go b/appvm.go
index b4d54b6..dffdddf 100644
--- a/appvm.go
+++ b/appvm.go
@@ -114,10 +114,10 @@ func start(l *libvirt.Libvirt, name string) {
 		log.Fatal(err)
 	}
 
-	_, _, _, err = system.System("nix-build", "<nixpkgs/nixos>", "-A", "config.system.build.vm",
+	stdout, stderr, ret, err := system.System("nix-build", "<nixpkgs/nixos>", "-A", "config.system.build.vm",
 		"-I", "nixos-config=nix/"+name+".nix", "-I", ".")
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalln(err, stdout, stderr, ret)
 	}
 
 	realpath, err := filepath.EvalSymlinks("result/system")