···

       
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- Certificate generation via the `security.acme` now limits the concurrent number of running certificate renewals and generation jobs, to avoid spiking resource usage when processing many certificates at once. The limit defaults to *5* and can be adjusted via `maxConcurrentRenewals`. Setting it to *0* disables the limits altogether.

     

       
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266
       
+
       
- New `boot.bcache.enable` (default enabled) allows completely removing `bcache` mount support.

     

       
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267
       
+
       


     

       
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## Nixpkgs internals {#sec-release-23.11-nixpkgs-internals}

     

       
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- The use of `sourceRoot = "source";`, `sourceRoot = "source/subdir";`, and similar lines in package derivations using the default `unpackPhase` is deprecated as it requires `unpackPhase` to always produce a directory named "source". Use `sourceRoot = src.name`, `sourceRoot = "${src.name}/subdir";`, or `setSourceRoot = "sourceRoot=$(echo */subdir)";` or similar instead.

     

···

       
1
       
1
       
-
       
{ config, lib, pkgs, ... }:

     

       
2
       
2
       
-
       


     

       
3
       
3
       
-
       
{

     

       
1
       
1
       
+
       
{ config, lib, pkgs, ... }: let

     

       
2
       
2
       
+
       
  cfg = config.boot.bcache;

     

       
3
       
3
       
+
       
in {

     

       
4
       
4
       
+
       
  options.boot.bcache.enable = lib.mkEnableOption (lib.mdDoc "bcache mount support") // {

     

       
5
       
5
       
+
       
    default = true;

     

       
6
       
6
       
+
       
    example = false;

     

       
7
       
7
       
+
       
  };

     

       
4
       
8
       
 
       
  options.boot.initrd.services.bcache.enable = lib.mkEnableOption (lib.mdDoc "bcache support in the initrd") // {

     

       
5
       
9
       
 
       
    description = lib.mdDoc ''

     

       
6
       
10
       
 
       
      *This will only be used when systemd is used in stage 1.*

     
···

       
9
       
13
       
 
       
    '';

     

       
10
       
14
       
 
       
  };

     

       
11
       
15
       
 
       


     

       
12
       
12
       
-
       
  config = {

     

       
16
       
16
       
+
       
  config = lib.mkIf cfg.enable {

     

       
13
       
17
       
 
       


     

       
14
       
18
       
 
       
    environment.systemPackages = [ pkgs.bcache-tools ];

     

       
15
       
19