diff --git a/default.nix b/default.nix
index 481202b75ca..09c9a1569d8 100644
--- a/default.nix
+++ b/default.nix
@@ -4,8 +4,7 @@ let
     let env = builtins.getEnv "NIXOS_CONFIG"; in
     if env == "" then /etc/nixos/configuration.nix else env;
 
-  system = import system/system.nix {configuration = import configFileName; 
-    inherit configFileName; };
+  system = import system/system.nix {configuration = import configFileName;};
 
 in
 
diff --git a/system/options.nix b/system/options.nix
index 8511e65a066..bf571d56635 100644
--- a/system/options.nix
+++ b/system/options.nix
@@ -338,6 +338,14 @@
       ";
     };
 
+    enableIntel3945ABGFirmware = mkOption {
+      default = true;
+      description = "
+        This option enables automatic loading of the firmware for the Intel
+        PRO/Wireless 3945ABG.
+      ";
+    };
+
     localCommands = mkOption {
       default = "";
       example = "text=anything; echo You can put $text here.";
diff --git a/system/system.nix b/system/system.nix
index a1ceb345ccd..5b6f23749f0 100644
--- a/system/system.nix
+++ b/system/system.nix
@@ -1,7 +1,6 @@
 { platform ? __currentSystem
 , stage2Init ? ""
 , configuration
-, configFileName ? ""
 }:
 
 rec {
@@ -247,10 +246,7 @@ rec {
   ++ pkgs.lib.optional (config.networking.defaultMailServer.directDelivery) pkgs.ssmtp
   ++ pkgs.lib.concatLists (map (job: job.extraPath) upstartJobs.jobs)
   ++ (config.environment.extraPackages) pkgs
-  ++ pkgs.lib.optional (config.fonts.enableFontDir) fontDir
-  ++ pkgs.lib.optional (configFileName != "" ) 
-    (pkgs.runCommand "configuration" {} '' mkdir -p $out/share && cp "${configFileName}" $out/share/configuration.nix '')
-  ;
+  ++ pkgs.lib.optional (config.fonts.enableFontDir) fontDir;
 
 
   # We don't want to put all of `startPath' and `path' in $PATH, since
diff --git a/upstart-jobs/default.nix b/upstart-jobs/default.nix
index 6fceee08cfe..7fe6d45dfe6 100644
--- a/upstart-jobs/default.nix
+++ b/upstart-jobs/default.nix
@@ -26,12 +26,12 @@ let
       inherit (pkgs) stdenv writeText substituteAll udev procps;
       inherit (pkgs.lib) cleanSource;
       firmwareDirs =
-        pkgs.lib.optional (config.networking.enableIntel2200BGFirmware) pkgs.ipw2200fw
-	++
-	(config.services.udev.addFirmware);
+           pkgs.lib.optional config.networking.enableIntel2200BGFirmware pkgs.ipw2200fw
+        ++ pkgs.lib.optional config.networking.enableIntel3945ABGFirmware pkgs.iwlwifi3945ucode
+	++ config.services.udev.addFirmware;
       extraUdevPkgs =
-        pkgs.lib.optional (config.services.hal.enable) pkgs.hal;
-	sndMode = config.services.udev.sndMode;
+        pkgs.lib.optional config.services.hal.enable pkgs.hal;
+      sndMode = config.services.udev.sndMode;
     })
       
     # Makes LVM logical volumes available. 
diff --git a/upstart-jobs/udev-firmware-loader.sh b/upstart-jobs/udev-firmware-loader.sh
index 03f0290fd33..3592e72bb13 100755
--- a/upstart-jobs/udev-firmware-loader.sh
+++ b/upstart-jobs/udev-firmware-loader.sh
@@ -6,14 +6,16 @@ exec > /var/log/udev-fw 2>&1
 
 if test "$ACTION" = "add"; then
 
-    ls -l /sys/$DEVPATH >> /tmp/fw 2>&1
+    ls -l /sys/$DEVPATH
 
     if ! test -e /sys/$DEVPATH/loading; then
         echo "Firmware loading is not supported by device \`DEVPATH'."
         exit 1
     fi
 
-    for dir in @firmwareDirs@; do
+    # /root/test-firmware is an impure location allowing quick testing
+    # of firmwares.
+    for dir in /root/test-firmware @firmwareDirs@; do
         if test -e "$dir/$FIRMWARE"; then
             echo "Loading \`$FIRMWARE' for device \`$DEVPATH' from $dir."
             echo 1 > /sys/$DEVPATH/loading