From 08278afff6e71266c162f80d980fe851060e2a4c Mon Sep 17 00:00:00 2001
From: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
Date: Sun, 14 Jun 2026 20:43:51 -1000
Subject: [PATCH] users: realpath home dirs before comparison

When we create users with homedir under /var, they end up with
NFSHomeDirectory under /private/var because /var is a symlink. This
breaks consequent activations and requires that user overrides their
home dir attribute with /private/var/... to pass the activation
precheck.

`realpath` should normalize the discrepancy.
---
 modules/users/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/modules/users/default.nix b/modules/users/default.nix
index b491c02..5db7541 100644
--- a/modules/users/default.nix
+++ b/modules/users/default.nix
@@ -203,7 +203,9 @@ in
               else
                 homeDirectory=$(dscl . -read ${dsclUser} NFSHomeDirectory)
                 homeDirectory=''${homeDirectory#NFSHomeDirectory: }
-                if [[ ${escapeShellArg v.home} != "$homeDirectory" ]]; then
+                configuredHomeDirectory=$(realpath ${escapeShellArg v.home})
+                homeDirectory=$(realpath "$homeDirectory")
+                if [[ "$configuredHomeDirectory" != "$homeDirectory" ]]; then
                   printf >&2 '\e[1;31merror: config contains the wrong home directory for %s, aborting activation\e[0m\n' ${name}
                   printf >&2 'nix-darwin does not support changing the home directory of existing users.\n'
                   printf >&2 '\n'