Move stuff to modules/profiles/installation-device.nix

nixos/modules/installer/cd-dvd/installation-cd-base.nix

@@ -7,8 +7,7 @@ with lib;
 
 {
   imports =
-    [ ./channel.nix
-      ./iso-image.nix
+    [ ./iso-image.nix
 
       # Profiles of this basic installation CD.
       ../../profiles/all-hardware.nix
@@ -21,18 +20,6 @@ with lib;
 
   isoImage.volumeID = substring 0 11 "NIXOS_ISO";
 
-  # Make the installer more likely to succeed in low memory
-  # environments.  The kernel's overcommit heustistics bite us
-  # fairly often, preventing processes such as nix-worker or
-  # download-using-manifests.pl from forking even if there is
-  # plenty of free memory.
-  boot.kernel.sysctl."vm.overcommit_memory" = "1";
-
-  # To speed up installation a little bit, include the complete stdenv
-  # in the Nix store on the CD.  Archive::Cpio is needed for the
-  # initrd builder.  nixos-artwork is needed for the GRUB background.
-  isoImage.storeContents = [ pkgs.stdenv pkgs.busybox pkgs.perlPackages.ArchiveCpio pkgs.nixos-artwork ];
-
   # EFI booting
   isoImage.makeEfiBootable = true;
 

nixos/modules/installer/cd-dvd/installation-cd-minimal.nix

@@ -1,14 +1,11 @@
 # This module defines a small NixOS installation CD.  It does not
 # contain any graphical stuff.
 
-{ config, pkgs, lib, ... }:
+{ config, lib, ... }:
 
 {
   imports =
     [ ./installation-cd-base.nix
       ../../profiles/minimal.nix
     ];
-
-  # Enable in installer, even if minimal profile disables it
-  services.nixosManual.enable = lib.mkOverride 999 true;
 }

nixos/modules/profiles/installation-device.nix

@@ -1,5 +1,5 @@
 # Provide a basic configuration for installation devices like CDs.
-{ config, lib, ... }:
+{ config, pkgs, lib, ... }:
 
 with lib;
 
@@ -13,10 +13,17 @@ with lib;
       # Allow "nixos-rebuild" to work properly by providing
       # /etc/nixos/configuration.nix.
       ./clone-config.nix
+
+      # Include a copy of Nixpkgs so that nixos-install works out of
+      # the box.
+      ../installer/cd-dvd/channel.nix
     ];
 
   config = {
 
+    # Enable in installer, even if the minimal profile disables it.
+    services.nixosManual.enable = mkForce true;
+
     # Show the manual.
     services.nixosManual.showManual = true;
 
@@ -43,7 +50,7 @@ with lib;
     systemd.services.sshd.wantedBy = mkOverride 50 [];
 
     # Enable wpa_supplicant, but don't start it by default.
-    networking.wireless.enable = true;
+    networking.wireless.enable = mkDefault true;
     jobs.wpa_supplicant.startOn = mkOverride 50 "";
 
     # Tell the Nix evaluator to garbage collect more aggressively.
@@ -51,5 +58,17 @@ with lib;
     # (yet) have swap set up.
     environment.variables.GC_INITIAL_HEAP_SIZE = "100000";
 
+    # Make the installer more likely to succeed in low memory
+    # environments.  The kernel's overcommit heustistics bite us
+    # fairly often, preventing processes such as nix-worker or
+    # download-using-manifests.pl from forking even if there is
+    # plenty of free memory.
+    boot.kernel.sysctl."vm.overcommit_memory" = "1";
+
+    # To speed up installation a little bit, include the complete
+    # stdenv in the Nix store on the CD.  Archive::Cpio is needed for
+    # the initrd builder.
+    system.extraDependencies = [ pkgs.stdenv pkgs.busybox pkgs.perlPackages.ArchiveCpio ];
+
   };
 }