From d52880eeae09aaacd308430499f55810157b1a6d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 12 Apr 2013 13:16:57 +0200
Subject: [PATCH 02/18] Don't try to unmount /nix or /nix/store

They'll still be remounted read-only.

https://github.com/NixOS/nixos/issues/126
---
 src/shared/fstab-util.c | 2 ++
 src/shutdown/umount.c   | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/shared/fstab-util.c b/src/shared/fstab-util.c
index 806dda8475..0220741c91 100644
--- a/src/shared/fstab-util.c
+++ b/src/shared/fstab-util.c
@@ -40,6 +40,8 @@ bool fstab_is_extrinsic(const char *mount, const char *opts) {
         /* Don't bother with the OS data itself */
         if (PATH_IN_SET(mount,
                         "/",
+                        "/nix",
+                        "/nix/store",
                         "/usr",
                         "/etc"))
                 return true;
diff --git a/src/shutdown/umount.c b/src/shutdown/umount.c
index 8a5e80eeaa..fab35ed6f3 100644
--- a/src/shutdown/umount.c
+++ b/src/shutdown/umount.c
@@ -414,6 +414,8 @@ static int delete_dm(dev_t devnum) {
 
 static bool nonunmountable_path(const char *path) {
         return path_equal(path, "/")
+                || path_equal(path, "/nix")
+                || path_equal(path, "/nix/store")
 #if ! HAVE_SPLIT_USR
                 || path_equal(path, "/usr")
 #endif
-- 
2.27.0