···

       
31
       
 
       
      echo -n ${config.system.nixos.versionSuffix} > $out/nixos/.version-suffix

     

       
32
       
 
       
      echo ${config.system.nixos.versionSuffix} | sed -e s/pre// > $out/nixos/svn-revision

     

       
33
       
 
       
    '';

     

       
34
       
-
       


     

       
35
       
 
       
in

     

       
36
       
 
       


     

       
37
       
 
       
{

     

       
38
       
-
       
  # Pin the nixpkgs flake in the installer to our cleaned up nixpkgs source.

     

       
39
       
-
       
  # FIXME: this might be surprising and is really only needed for offline installations,

     

       
40
       
-
       
  # see discussion in https://github.com/NixOS/nixpkgs/pull/204178#issuecomment-1336289021

     

       
41
       
-
       
  nix.registry.nixpkgs.to = {

     

       
42
       
-
       
    type = "path";

     

       
43
       
-
       
    path = "${channelSources}/nixos";

     

       
44
       
-
       
  };

     

       
0
       
 
       

     

       
0
       
 
       

     

       
45
       
 
       


     

       
46
       
-
       
  # Provide the NixOS/Nixpkgs sources in /etc/nixos.  This is required

     

       
47
       
-
       
  # for nixos-install.

     

       
48
       
-
       
  boot.postBootCommands = lib.mkAfter

     

       
49
       
-
       
    ''

     

       
50
       
-
       
      if ! [ -e /var/lib/nixos/did-channel-init ]; then

     

       
51
       
-
       
        echo "unpacking the NixOS/Nixpkgs sources..."

     

       
52
       
-
       
        mkdir -p /nix/var/nix/profiles/per-user/root

     

       
53
       
-
       
        ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels \

     

       
54
       
-
       
          -i ${channelSources} --quiet --option build-use-substitutes false \

     

       
55
       
-
       
          ${lib.optionalString config.boot.initrd.systemd.enable "--option sandbox false"} # There's an issue with pivot_root

     

       
56
       
-
       
        mkdir -m 0700 -p /root/.nix-defexpr

     

       
57
       
-
       
        ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels

     

       
58
       
-
       
        mkdir -m 0755 -p /var/lib/nixos

     

       
59
       
-
       
        touch /var/lib/nixos/did-channel-init

     

       
60
       
-
       
      fi

     

       
61
       
-
       
    '';

     

       
0
       
 
       

     

       
62
       
 
       
}

     

···

       
31
       
 
       
      echo -n ${config.system.nixos.versionSuffix} > $out/nixos/.version-suffix

     

       
32
       
 
       
      echo ${config.system.nixos.versionSuffix} | sed -e s/pre// > $out/nixos/svn-revision

     

       
33
       
 
       
    '';

     

       
0
       
 
       

     

       
34
       
 
       
in

     

       
35
       
 
       


     

       
36
       
 
       
{

     

       
37
       
+
       
  options.system.installer.channel.enable = (lib.mkEnableOption "bundling NixOS/Nixpkgs channel in the installer") // { default = true; };

     

       
38
       
+
       
  config = lib.mkIf config.system.installer.channel.enable {

     

       
39
       
+
       
    # Pin the nixpkgs flake in the installer to our cleaned up nixpkgs source.

     

       
40
       
+
       
    # FIXME: this might be surprising and is really only needed for offline installations,

     

       
41
       
+
       
    # see discussion in https://github.com/NixOS/nixpkgs/pull/204178#issuecomment-1336289021

     

       
42
       
+
       
    nix.registry.nixpkgs.to = {

     

       
43
       
+
       
      type = "path";

     

       
44
       
+
       
      path = "${channelSources}/nixos";

     

       
45
       
+
       
    };

     

       
46
       
 
       


     

       
47
       
+
       
    # Provide the NixOS/Nixpkgs sources in /etc/nixos.  This is required

     

       
48
       
+
       
    # for nixos-install.

     

       
49
       
+
       
    boot.postBootCommands = lib.mkAfter

     

       
50
       
+
       
      ''

     

       
51
       
+
       
        if ! [ -e /var/lib/nixos/did-channel-init ]; then

     

       
52
       
+
       
          echo "unpacking the NixOS/Nixpkgs sources..."

     

       
53
       
+
       
          mkdir -p /nix/var/nix/profiles/per-user/root

     

       
54
       
+
       
          ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels \

     

       
55
       
+
       
            -i ${channelSources} --quiet --option build-use-substitutes false \

     

       
56
       
+
       
            ${lib.optionalString config.boot.initrd.systemd.enable "--option sandbox false"} # There's an issue with pivot_root

     

       
57
       
+
       
          mkdir -m 0700 -p /root/.nix-defexpr

     

       
58
       
+
       
          ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels

     

       
59
       
+
       
          mkdir -m 0755 -p /var/lib/nixos

     

       
60
       
+
       
          touch /var/lib/nixos/did-channel-init

     

       
61
       
+
       
        fi

     

       
62
       
+
       
      '';

     

       
63
       
+
       
  };

     

       
64
       
 
       
}