Merge branch 'master' into staging

Conflicts:
      pkgs/applications/misc/navit/default.nix
      pkgs/applications/networking/mailreaders/alpine/default.nix
      pkgs/applications/networking/mailreaders/realpine/default.nix
      pkgs/development/compilers/ghc/head.nix
      pkgs/development/libraries/openssl/default.nix
      pkgs/games/liquidwar/default.nix
      pkgs/games/spring/springlobby.nix
      pkgs/os-specific/linux/kernel/perf.nix
      pkgs/servers/sip/freeswitch/default.nix
      pkgs/tools/archivers/cromfs/default.nix
      pkgs/tools/graphics/plotutils/default.nix

nixos/modules/system/boot/stage-1.nix

@@ -3,7 +3,7 @@
 # the modules necessary to mount the root file system, then calls the
 # init in the root file system to start the second boot stage.
 
-{ config, lib, pkgs, ... }:
+{ config, lib, utils, pkgs, ... }:
 
 with lib;
 
@@ -23,6 +23,12 @@ let
   };
 
 
+  # The initrd only has to mount `/` or any FS marked as necessary for
+  # booting (such as the FS containing `/nix/store`, or an FS needed for
+  # mounting `/`, like `/` on a loopback).
+  fileSystems = filter utils.fsNeededForBoot config.system.build.fileSystems;
+
+
   # Some additional utilities needed in stage 1, like mount, lvm, fsck
   # etc.  We don't want to bring in all of those packages, so we just
   # copy what we need.  Instead of using statically linked binaries,
@@ -71,7 +77,7 @@ let
       ln -sf kmod $out/bin/modprobe
 
       # Copy resize2fs if needed.
-      ${optionalString (any (fs: fs.autoResize) (attrValues config.fileSystems)) ''
+      ${optionalString (any (fs: fs.autoResize) fileSystems) ''
         # We need mke2fs in the initrd.
         copy_bin_and_libs ${pkgs.e2fsprogs}/sbin/resize2fs
       ''}
@@ -128,21 +134,6 @@ let
     ''; # */
 
 
-  # The initrd only has to mount / or any FS marked as necessary for
-  # booting (such as the FS containing /nix/store, or an FS needed for
-  # mounting /, like / on a loopback).
-  #
-  # We need to guarantee that / is the first filesystem in the list so
-  # that if and when lustrateRoot is invoked, nothing else is mounted
-  fileSystems = let
-    filterNeeded = filter
-      (fs: fs.mountPoint != "/" && (fs.neededForBoot || elem fs.mountPoint [ "/nix" "/nix/store" "/var" "/var/log" "/var/lib" "/etc" ]));
-    filterRoot = filter
-      (fs: fs.mountPoint == "/");
-    allFileSystems = attrValues config.fileSystems;
-  in (filterRoot allFileSystems) ++ (filterNeeded allFileSystems);
-
-
   udevRules = pkgs.stdenv.mkDerivation {
     name = "udev-rules";
     allowedReferences = [ extraUtils ];
@@ -405,9 +396,8 @@ in
   };
 
   config = mkIf (!config.boot.isContainer) {
-
     assertions = [
-      { assertion = any (fs: fs.mountPoint == "/") (attrValues config.fileSystems);
+      { assertion = any (fs: fs.mountPoint == "/") fileSystems;
         message = "The ‘fileSystems’ option does not specify your root file system.";
       }
       { assertion = let inherit (config.boot) resumeDevice; in