From ad49db64da904bf408a9f5b54764c8649f54629a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
Date: Wed, 21 Oct 2015 21:34:12 +0200
Subject: [PATCH] build-fhs-chrootenv: add /etc/mtab -> /proc/mounts symlink

Needed to be able to run some programs (e.g. tune2fs) in the chroot.

AFAIK, /etc/mtab is deprecated, but programs still use it.
---
 pkgs/build-support/build-fhs-chrootenv/env.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/build-support/build-fhs-chrootenv/env.nix b/pkgs/build-support/build-fhs-chrootenv/env.nix
index a245778bf386..4c307a77d126 100644
--- a/pkgs/build-support/build-fhs-chrootenv/env.nix
+++ b/pkgs/build-support/build-fhs-chrootenv/env.nix
@@ -98,6 +98,9 @@ let
       # symlink SSL certs
       mkdir -p ssl
       ln -s /host-etc/ssl/certs ssl/certs
+
+      # symlink /etc/mtab -> /proc/mounts (compat for old userspace progs)
+      ln -s /proc/mounts mtab
     '';
   };