From 8b38b6aae2f292339e1be04239361fba71c00774 Mon Sep 17 00:00:00 2001
From: Nikolay Amiantov <ab@fmap.me>
Date: Sun, 4 Sep 2016 16:42:26 +0300
Subject: [PATCH] runVM: check exit code before postVM eval

---
 pkgs/build-support/vm/default.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index 5b407f530dc8..81a9f89dd100 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -261,9 +261,12 @@ rec {
       exit 1
     fi
 
-    eval "$postVM"
+    exitCode="$(cat xchg/in-vm-exit)"
+    if [ "$exitCode" != "0" ]; then
+      exit "$exitCode"
+    fi
 
-    exit $(cat xchg/in-vm-exit)
+    eval "$postVM"
   '';