diff --git a/modules/config/system-path.nix b/modules/config/system-path.nix
index d989ddf4b919..ce27eb35dd9f 100644
--- a/modules/config/system-path.nix
+++ b/modules/config/system-path.nix
@@ -17,7 +17,6 @@ let
 
   requiredPackages =
     [ config.system.sbin.modprobe # must take precedence over module_init_tools
-      config.system.sbin.mount # must take precedence over util-linux
       config.system.build.upstart
       config.environment.nix
       pkgs.acl
diff --git a/modules/module-list.nix b/modules/module-list.nix
index 7d42571d0fa6..5a1459f52268 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -114,6 +114,7 @@
   ./services/networking/cntlm.nix
   ./services/networking/ddclient.nix
   ./services/networking/dhclient.nix
+  #./services/networking/dhcpcd.nix
   ./services/networking/dhcpd.nix
   ./services/networking/dnsmasq.nix
   ./services/networking/ejabberd.nix
@@ -198,6 +199,10 @@
   ./system/upstart/upstart.nix
   ./tasks/cpu-freq.nix
   ./tasks/filesystems.nix
+  ./tasks/filesystems/btrfs.nix
+  ./tasks/filesystems/ext.nix
+  ./tasks/filesystems/nfs.nix
+  ./tasks/filesystems/reiserfs.nix
   ./tasks/kbd.nix
   ./tasks/lvm.nix
   ./tasks/network-interfaces.nix
diff --git a/modules/profiles/base.nix b/modules/profiles/base.nix
index d67e7ca67343..d6412e09a5f0 100644
--- a/modules/profiles/base.nix
+++ b/modules/profiles/base.nix
@@ -31,7 +31,6 @@
 
     # Tools to create / manipulate filesystems.
     pkgs.ntfsprogs # for resizing NTFS partitions
-    pkgs.btrfsProgs
     pkgs.dosfstools
     pkgs.xfsprogs
     pkgs.jfsutils
@@ -50,4 +49,8 @@
     pkgs.bvi # binary editor
     pkgs.joe
   ];
+
+  # Include support for various filesystems.
+  boot.supportedFilesystems = [ "btrfs" "reiserfs" ];
+
 }
diff --git a/modules/services/misc/autofs.nix b/modules/services/misc/autofs.nix
index eb3105e3a09a..e55c213ed21a 100644
--- a/modules/services/misc/autofs.nix
+++ b/modules/services/misc/autofs.nix
@@ -6,8 +6,6 @@ let
 
   cfg = config.services.autofs;
 
-  mount = config.system.sbin.mount;
-
   autoMaster = pkgs.writeText "auto.master" cfg.autoMaster;
 
 in
@@ -114,7 +112,7 @@ in
           unescapeSpaces(){ sed 's/\\040/ /g'; }
           sed -n 's@^\s*\(\([^\\ ]\|\\ \)*\)\s.*@\1@p' ${autoMaster} | sed 's/[\\]//' | while read mountPoint; do
             sed -n "s@[^ ]\+\s\+\($(echo "$mountPoint"| escapeSpaces)[^ ]*\).*@\1@p" /proc/mounts | sort -r | unescapeSpaces| while read smountP; do
-              ${mount}/bin/umount -l "$smountP" || true
+              ${pkgs.utillinux}/bin/umount -l "$smountP" || true
             done
           done
           '';
diff --git a/modules/services/network-filesystems/nfs-kernel.nix b/modules/services/network-filesystems/nfs-kernel.nix
index 8ed22edf01e1..1ebc268ecf8f 100644
--- a/modules/services/network-filesystems/nfs-kernel.nix
+++ b/modules/services/network-filesystems/nfs-kernel.nix
@@ -151,7 +151,7 @@ in
                 ${config.system.sbin.modprobe}/sbin/modprobe nfsd || true
 
                 ${pkgs.sysvtools}/bin/mountpoint -q /proc/fs/nfsd \
-                || ${config.system.sbin.mount}/bin/mount -t nfsd none /proc/fs/nfsd
+                || ${pkgs.utillinux}/bin/mount -t nfsd none /proc/fs/nfsd
 
                 ${optionalString cfg.server.createMountPoints
                   ''
diff --git a/modules/system/boot/kernel.nix b/modules/system/boot/kernel.nix
index c8ed496d8ae8..ea5a300fbce6 100644
--- a/modules/system/boot/kernel.nix
+++ b/modules/system/boot/kernel.nix
@@ -148,9 +148,6 @@ let kernel = config.boot.kernelPackages.kernel; in
         "ide_disk"
         "ide_generic"
 
-        # Filesystems.
-        "ext2" "ext3" "ext4"
-
         # Support USB keyboards, in case the boot fails and we only have
         # a USB keyboard.
         "uhci_hcd"
diff --git a/modules/system/boot/stage-1.nix b/modules/system/boot/stage-1.nix
index bc27c9f80ffa..5a74ea84f38b 100644
--- a/modules/system/boot/stage-1.nix
+++ b/modules/system/boot/stage-1.nix
@@ -153,17 +153,6 @@ let
       cp -v ${pkgs.coreutils}/bin/sleep $out/bin
       cp -v ${pkgs.coreutils}/bin/ln $out/bin
 
-      # Copy e2fsck and friends.
-      cp -v ${pkgs.e2fsprogs}/sbin/e2fsck $out/bin
-      cp -v ${pkgs.e2fsprogs}/sbin/tune2fs $out/bin
-      cp -v ${pkgs.reiserfsprogs}/sbin/reiserfsck $out/bin
-      ln -sv e2fsck $out/bin/fsck.ext2
-      ln -sv e2fsck $out/bin/fsck.ext3
-      ln -sv e2fsck $out/bin/fsck.ext4
-      ln -sv reiserfsck $out/bin/fsck.reiserfs
-
-      cp -pdv ${pkgs.e2fsprogs}/lib/lib*.so.* $out/lib
-
       # Copy dmsetup and lvm.
       cp -v ${pkgs.lvm2}/sbin/dmsetup $out/bin/dmsetup
       cp -v ${pkgs.lvm2}/sbin/lvm $out/bin/lvm
@@ -189,11 +178,6 @@ let
         cp ${kernelPackages.splashutils}/${kernelPackages.splashutils.helperName} $out/bin/splash_helper
       ''}
 
-      # Copy nfsmount if there is any NFS mounts required for boot.
-      ${optionalString (filter (fs: fs.fsType == "nfs" && (fs.mountPoint == "/" || fs.neededForBoot)) fileSystems != []) ''
-        cp -v ${pkgs.klibc}/lib/klibc/bin.static/nfsmount $out/bin
-      ''}
-
       ${config.boot.initrd.extraUtilsCommands}
 
       # Run patchelf to make the programs refer to the copied libraries.
@@ -223,13 +207,10 @@ let
       export LD_LIBRARY_PATH=$out/lib
       $out/bin/mount --version | grep "mount from"
       $out/bin/umount --version | grep "umount "
-      $out/bin/e2fsck -V 2>&1 | grep "e2fsck "
-      $out/bin/tune2fs 2> /dev/null | grep "tune2fs "
       $out/bin/udevadm --version
       $out/bin/blkid -v 2>&1 | tee -a $out/log | grep "blkid from util-linux"
       $out/bin/dmsetup --version 2>&1 | tee -a $out/log | grep "version:"
       LVM_SYSTEM_DIR=$out $out/bin/lvm version 2>&1 | tee -a $out/log | grep "LVM"
-      $out/bin/reiserfsck -V
       $out/bin/mdadm --version
       $out/bin/basename --version
       $out/bin/modprobe --version
diff --git a/modules/tasks/filesystems.nix b/modules/tasks/filesystems.nix
index 59e1137852a6..75cec61fd6cb 100644
--- a/modules/tasks/filesystems.nix
+++ b/modules/tasks/filesystems.nix
@@ -2,37 +2,6 @@
 
 with pkgs.lib;
 
-let
-  usingSome = fsname: any (fs: fs.fsType == fsname) config.fileSystems;
-  usingSomeStage1 =  fsname: any (fs: fs.fsType == fsname &&
-    (fs.mountPoint == "/" || fs.neededForBoot)) config.fileSystems;
-
-  usingBtrfs = usingSome "btrfs";
-  usingBtrfsStage1 = usingSomeStage1 "btrfs";
-
-  usingReiserfs = usingSome "reiserfs";
-  usingReiserfsStage1 = usingSomeStage1 "reiserfs";
-
-  # Packages that provide fsck backends.
-  fsPackages = [ pkgs.e2fsprogs pkgs.dosfstools ]
-    ++ optional usingReiserfs pkgs.btrfsProgs
-    ++ optional usingBtrfs pkgs.btrfsProgs;
-
-  fsKernelModules = optional usingBtrfsStage1 [ "btrfs" "crc32c" ]
-    ++ optional usingReiserfsStage1 [ "reiserfs" ];
-
-  fsExtraUtilsCommands = optionalString usingBtrfsStage1 ''
-      cp -v ${pkgs.btrfsProgs}/bin/btrfsck $out/bin
-      cp -v ${pkgs.btrfsProgs}/bin/btrfs $out/bin
-      ln -sv btrfsck $out/bin/fsck.btrfs
-    '';
-
-  fsPostDeviceCommands = optionalString usingBtrfsStage1 ''
-    btrfs device scan
-  '';
-
-in
-
 {
 
   ###### interface
@@ -54,7 +23,7 @@ in
         }
       ];
 
-      description = "
+      description = ''
         The file systems to be mounted.  It must include an entry for
         the root directory (<literal>mountPoint = \"/\"</literal>).  Each
         entry in the list is an attribute set with the following fields:
@@ -72,7 +41,7 @@ in
 
         <literal>autocreate</literal> forces <literal>mountPoint</literal> to be created with
         <command>mkdir -p</command> .
-      ";
+      '';
 
       type = types.nullOr (types.list types.optionSet);
 
@@ -81,36 +50,28 @@ in
         mountPoint = mkOption {
           example = "/mnt/usb";
           type = types.uniq types.string;
-          description = "
-            Location of the mounted the file system.
-          ";
+          description = "Location of the mounted the file system.";
         };
 
         device = mkOption {
           default = null;
           example = "/dev/sda";
           type = types.uniq (types.nullOr types.string);
-          description = "
-            Location of the device.
-          ";
+          description = "Location of the device.";
         };
 
         label = mkOption {
           default = null;
           example = "root-partition";
           type = types.uniq (types.nullOr types.string);
-          description = "
-            Label of the device (if any).
-          ";
+          description = "Label of the device (if any).";
         };
 
         fsType = mkOption {
           default = "auto";
           example = "ext3";
           type = types.uniq types.string;
-          description = "
-            Type of the file system.
-          ";
+          description = "Type of the file system.";
         };
 
         options = mkOption {
@@ -124,10 +85,10 @@ in
         autocreate = mkOption {
           default = false;
           type = types.bool;
-          description = "
+          description = ''
             Automatically create the mount point defined in
             <option>fileSystems.*.mountPoint</option>.
-          ";
+          '';
         };
 
         noCheck = mkOption {
@@ -138,12 +99,24 @@ in
       };
     };
 
-    system.sbin.mount = mkOption {
+    system.fsPackages = mkOption {
       internal = true;
-      default = pkgs.utillinux;
-      description = "
-        Package containing mount and umount.
-      ";
+      default = [ ];
+      description = "Packages supplying file system mounters and checkers.";
+    };
+
+    boot.supportedFilesystems = mkOption {
+      default = [ ];
+      example = [ "btrfs" ];
+      type = types.list types.string;
+      description = "Names of supported filesystem types.";
+    };
+
+    boot.initrd.supportedFilesystems = mkOption {
+      default = [ ];
+      example = [ "btrfs" ];
+      type = types.list types.string;
+      description = "Names of supported filesystem types in the initial ramdisk.";
     };
 
   };
@@ -153,10 +126,19 @@ in
 
   config = {
 
+    boot.supportedFilesystems =
+      map (fs: fs.fsType) config.fileSystems;
+
+    boot.initrd.supportedFilesystems =
+      map (fs: fs.fsType)
+        (filter (fs: fs.mountPoint == "/" || fs.neededForBoot) config.fileSystems);
+
     # Add the mount helpers to the system path so that `mount' can find them.
+    system.fsPackages = [ pkgs.dosfstools ];
+    
     environment.systemPackages =
-      [ pkgs.ntfs3g pkgs.cifs_utils pkgs.nfsUtils pkgs.mountall ]
-      ++ fsPackages;
+      [ pkgs.ntfs3g pkgs.cifs_utils pkgs.mountall ]
+      ++ config.system.fsPackages;
 
     environment.etc = singleton
       { source = pkgs.writeText "fstab"
@@ -183,10 +165,6 @@ in
         target = "fstab";
       };
 
-    boot.initrd.extraUtilsCommands = fsExtraUtilsCommands;
-    boot.initrd.postDeviceCommands = fsPostDeviceCommands;
-    boot.initrd.kernelModules = fsKernelModules;
-
     jobs.mountall =
       { startOn = "started udev"
           # !!! The `started nfs-kernel-statd' condition shouldn't be
@@ -198,12 +176,12 @@ in
 
         task = true;
 
+        path = [ pkgs.utillinux ] ++ config.system.fsPackages;
+
         script =
           ''
             exec > /dev/console 2>&1
             echo "mounting filesystems..."
-            export PATH=${config.system.sbin.mount}/bin:${makeSearchPath "sbin" ([pkgs.utillinux] ++ fsPackages)}:$PATH
-            ${optionalString usingBtrfs "${pkgs.btrfsProgs}/bin/btrfs device scan"}
             ${pkgs.mountall}/sbin/mountall
           '';
       };
diff --git a/modules/tasks/filesystems/btrfs.nix b/modules/tasks/filesystems/btrfs.nix
new file mode 100644
index 000000000000..c526b9677cf1
--- /dev/null
+++ b/modules/tasks/filesystems/btrfs.nix
@@ -0,0 +1,38 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  inInitrd = any (fs: fs == "btrfs") config.boot.initrd.supportedFilesystems;
+
+in
+
+{
+  config = mkIf (any (fs: fs == "btrfs") config.boot.supportedFilesystems) {
+
+    system.fsPackages = [ pkgs.btrfsProgs ];
+
+    boot.initrd.kernelModules = mkIf inInitrd [ "btrfs" "crc32c" ];
+
+    boot.initrd.extraUtilsCommands = mkIf inInitrd
+      ''
+        cp -v ${pkgs.btrfsProgs}/bin/btrfsck $out/bin
+        cp -v ${pkgs.btrfsProgs}/bin/btrfs $out/bin
+        ln -sv btrfsck $out/bin/fsck.btrfs
+      '';
+
+    boot.initrd.postDeviceCommands = mkIf inInitrd
+      ''
+        btrfs device scan
+      '';
+
+    # !!! This is broken.  There should be a udev rule to do this when
+    # new devices are discovered.
+    jobs.udev.postStart =
+      ''
+        ${pkgs.btrfsProgs}/bin/btrfs device scan
+      '';
+
+  };
+}
diff --git a/modules/tasks/filesystems/ext.nix b/modules/tasks/filesystems/ext.nix
new file mode 100644
index 000000000000..93cdef4c664d
--- /dev/null
+++ b/modules/tasks/filesystems/ext.nix
@@ -0,0 +1,22 @@
+{ config, pkgs, ... }:
+
+{
+  config = {
+
+    system.fsPackages = [ pkgs.e2fsprogs ];
+
+    boot.initrd.kernelModules = [ "ext2" "ext3" "ext4" ];
+
+    boot.initrd.extraUtilsCommands =
+      ''
+        # Copy e2fsck and friends.
+        cp -v ${pkgs.e2fsprogs}/sbin/e2fsck $out/bin
+        cp -v ${pkgs.e2fsprogs}/sbin/tune2fs $out/bin
+        ln -sv e2fsck $out/bin/fsck.ext2
+        ln -sv e2fsck $out/bin/fsck.ext3
+        ln -sv e2fsck $out/bin/fsck.ext4
+        cp -pdv ${pkgs.e2fsprogs}/lib/lib*.so.* $out/lib
+      '';
+
+  };
+}
diff --git a/modules/tasks/filesystems/nfs.nix b/modules/tasks/filesystems/nfs.nix
new file mode 100644
index 000000000000..546b63687211
--- /dev/null
+++ b/modules/tasks/filesystems/nfs.nix
@@ -0,0 +1,25 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  inInitrd = any (fs: fs == "nfs") config.boot.initrd.supportedFilesystems;
+
+in
+
+{
+  config = {
+
+    system.fsPackages = [ pkgs.nfsUtils ];
+
+    boot.initrd.kernelModules = mkIf inInitrd [ "nfs" ];
+
+    boot.initrd.extraUtilsCommands = mkIf inInitrd
+      ''
+        # !!! Uh, why don't we just install mount.nfs?
+        cp -v ${pkgs.klibc}/lib/klibc/bin.static/nfsmount $out/bin
+      '';
+
+  };
+}
diff --git a/modules/tasks/filesystems/reiserfs.nix b/modules/tasks/filesystems/reiserfs.nix
new file mode 100644
index 000000000000..f8c6a7000040
--- /dev/null
+++ b/modules/tasks/filesystems/reiserfs.nix
@@ -0,0 +1,25 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  inInitrd = any (fs: fs == "reiserfs") config.boot.initrd.supportedFilesystems;
+
+in
+
+{
+  config = mkIf (any (fs: fs == "reiserfs") config.boot.supportedFilesystems) {
+
+    system.fsPackages = [ pkgs.reiserfsprogs ];
+
+    boot.initrd.kernelModules = mkIf inInitrd [ "reiserfs" ];
+
+    boot.initrd.extraUtilsCommands = mkIf inInitrd
+      ''
+        cp -v ${pkgs.reiserfsprogs}/sbin/reiserfsck $out/bin
+        ln -sv reiserfsck $out/bin/fsck.reiserfs
+      '';
+
+  };
+}