From e88f1c93c5d812e052ef58662f363a9c6ad9bff9 Mon Sep 17 00:00:00 2001
From: Petru Paler <petru@paler.net>
Date: Thu, 30 Oct 2025 07:21:40 +0000
Subject: [PATCH] Another attempt at thoroughly fixing tmux ssh agent.

---
 home/default.nix         | 4 +++-
 home/programs/server.nix | 6 +++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/home/default.nix b/home/default.nix
index c188eb2..eb04dfb 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -29,7 +29,9 @@
 
     file.".ssh/rc".text = ''
       #!/bin/sh
-      ln -sf "$SSH_AUTH_SOCK" "$HOME/.ssh/ssh_auth_sock"
+      if test "$SSH_AUTH_SOCK"; then
+        ln -sf "$SSH_AUTH_SOCK" "$HOME/.ssh/ssh_auth_sock"
+      fi
     '';
     file.".ssh/rc".executable = true;
   };
diff --git a/home/programs/server.nix b/home/programs/server.nix
index 5716ab9..b3744c2 100644
--- a/home/programs/server.nix
+++ b/home/programs/server.nix
@@ -398,7 +398,11 @@
         setw -g automatic-rename on
         set -g set-titles on
 
-        set-environment -g 'SSH_AUTH_SOCK' $HOME/.ssh/ssh_auth_sock
+        # first, unset update-environment[SSH_AUTH_SOCK] (idx 3), to prevent
+        # the client overriding the global value
+        set-option -g -u update-environment[3]
+        # And set the global value to our static symlink'd path:
+        set-environment -g SSH_AUTH_SOCK $HOME/.ssh/ssh_auth_sock
       '';
     };
   };