also save git hash to nixos generations

README.md

@@ -4,7 +4,7 @@ The nix configuration of mine. I am trying to find a very suitable workplace for
 
 But There are couple of things i need to do before:
 
-- [ ] add git hash to the nixos build generations
+- [x] add git hash to the nixos build generations
 - [ ] fix cuda drivers
     - [ ] fix nvidia-smi command
     - [ ] compile a cuda program successfully

configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, pkgs-unstable, ... }:
+{ config, pkgs, pkgs-unstable, system-label, ... }:
 
 {
   imports =
@@ -182,6 +182,7 @@
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;
+  system.nixos.label = system-label;
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions

flake.nix

@@ -14,15 +14,16 @@
     ...
   }: {
       nixosConfigurations = {
-        revision = self.shortRev or self.dirtyShortRev or self.lastModified or "unknown";
+        # revision = self.shortRev or self.dirtyShortRev or self.lastModified or "unknown";
         tartarus = nixpkgs.lib.nixosSystem rec {
           system = "x86_64-linux";
           modules = [ ./configuration.nix ];
           specialArgs = {
-          pkgs-unstable = import nixpkgs-unstable {
+            pkgs-unstable = import nixpkgs-unstable {
               inherit system;
               config.allowUnfree = true;
             };
+            system-label = self.shortRev or self.dirtyShortRev or self.lastModified or "unknown";
           };
         };
       };