From 9e9a6e6ee64f9f77c84f96f1f89aa2f41b761ef0 Mon Sep 17 00:00:00 2001
From: Dmitry Voronin <hi@voronind.com>
Date: Sat, 12 Oct 2024 18:15:47 +0300
Subject: [PATCH] Home Manager : Better backup.

---
 home/NixOs.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/home/NixOs.nix b/home/NixOs.nix
index 2c63fe9..b7382d0 100644
--- a/home/NixOs.nix
+++ b/home/NixOs.nix
@@ -47,7 +47,9 @@ in
         }
       ) { } cfg.users;
 
-      backupFileExtension = "old";
+      backupFileExtension =
+        "backup-"
+        + pkgs.lib.readFile "${pkgs.runCommand "timestamp" { } "echo -n date '+%Y%m%d%H%M%S' > $out"}";
     };
   };
 }