diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 7f5d2c7bd..bf09b7424 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -155,14 +155,13 @@ let
           to = concatMapStringsSep "," (getAttr "mail") (toList to);
         };
       in mapAttrsToList format (with config.krebs.users; let
-        eloop-ml = spam-ml ++ [ ciko Mic92 ];
+        eloop-ml = spam-ml ++ [ ciko ];
         spam-ml = [
           lass
           makefu
           tv
         ];
         ciko.mail = "wieczorek.stefan@gmail.com";
-        Mic92.mail = "joerg@higgsboson.tk";
       in {
         "anmeldung@eloop.org" = eloop-ml;
         "cfp@eloop.org" = eloop-ml;
diff --git a/krebs/3modules/iptables.nix b/krebs/3modules/iptables.nix
index a4a4de6f9..09b493c20 100644
--- a/krebs/3modules/iptables.nix
+++ b/krebs/3modules/iptables.nix
@@ -29,9 +29,10 @@ let
     tables = mkOption {
       type = with types; attrsOf (attrsOf (submodule ({
         options = {
+          #TODO: find out good defaults.
           policy = mkOption {
             type = str;
-            default = "-";
+            default = "ACCEPT";
           };
           rules = mkOption {
             type = nullOr (listOf (submodule ({
@@ -133,30 +134,9 @@ let
 #=====
 
   rules = iptables-version:
-    let
-      #TODO: find out good defaults.
-      tables-defaults = {
-        nat.PREROUTING.policy = "ACCEPT";
-        nat.INPUT.policy = "ACCEPT";
-        nat.OUTPUT.policy = "ACCEPT";
-        nat.POSTROUTING.policy = "ACCEPT";
-        filter.INPUT.policy = "ACCEPT";
-        filter.FORWARD.policy = "ACCEPT";
-        filter.OUTPUT.policy = "ACCEPT";
-
-        #if someone specifies any other rules on this chain, the default rules get lost.
-        #is this wanted beahiviour or a bug?
-        #TODO: implement abstraction of rules
-        filter.INPUT.rules = [
-          { predicate = "-m conntrack --ctstate RELATED,ESTABLISHED"; target = "ACCEPT"; }
-        ];
-      };
-      tables = tables-defaults // cfg.tables;
-
-    in
-      pkgs.writeText "krebs-iptables-rules${iptables-version}" ''
-        ${buildTables iptables-version tables}
-      '';
+    pkgs.writeText "krebs-iptables-rules${iptables-version}" ''
+      ${buildTables iptables-version cfg.tables}
+    '';
 
   startScript = pkgs.writeDash "krebs-iptables_start" ''
     set -euf
diff --git a/lass/2configs/baseX.nix b/lass/2configs/baseX.nix
index fbab23500..cdb6d34ab 100644
--- a/lass/2configs/baseX.nix
+++ b/lass/2configs/baseX.nix
@@ -36,6 +36,7 @@ in {
     gitAndTools.qgit
     lm_sensors
     much
+    ncdu
     nmap
     pavucontrol
     powertop
diff --git a/lass/2configs/buildbot-standalone.nix b/lass/2configs/buildbot-standalone.nix
index e7fbccb77..72cd66420 100644
--- a/lass/2configs/buildbot-standalone.nix
+++ b/lass/2configs/buildbot-standalone.nix
@@ -18,25 +18,34 @@ in {
     };
     change_source.stockholm = ''
       stockholm_repo = '${stockholm-mirror-url}'
-      cs.append(changes.GitPoller(
+      cs.append(
+          changes.GitPoller(
               stockholm_repo,
               workdir='stockholm-poller', branches=True,
               project='stockholm',
-              pollinterval=120))
+              pollinterval=120
+          )
+      )
     '';
     scheduler = {
       build-scheduler = ''
         # build all hosts
-        sched.append(schedulers.SingleBranchScheduler(
-                                    change_filter=util.ChangeFilter(branch_re=".*"),
-                                    treeStableTimer=10,
-                                    name="build-all-branches",
-                                    builderNames=["build-all", "build-pkgs"]))
+        sched.append(
+              schedulers.SingleBranchScheduler(
+                  change_filter=util.ChangeFilter(branch_re=".*"),
+                  treeStableTimer=10,
+                  name="build-all-branches",
+                  builderNames=["build-hosts", "build-pkgs"]
+              )
+        )
       '';
     };
     builder_pre = ''
       # prepare grab_repo step for stockholm
-      grab_repo = steps.Git(repourl=stockholm_repo, mode='full')
+      grab_repo = steps.Git(
+          repourl=stockholm_repo,
+          mode='full'
+      )
 
       # TODO: get nixpkgs/stockholm paths from krebs
       env_lass = {
@@ -57,45 +66,73 @@ in {
 
       # prepare nix-shell
       # the dependencies which are used by the test script
-      deps = [ "gnumake", "jq", "nix", "(import <stockholm>).pkgs.populate", "openssh" ]
+      deps = [
+        "gnumake",
+        "jq",
+        "nix",
+        "(import <stockholm>).pkgs.populate",
+        "openssh"
+      ]
       # TODO: --pure , prepare ENV in nix-shell command:
       #                   SSL_CERT_FILE,LOGNAME,NIX_REMOTE
-      nixshell = ["nix-shell",
-                    "-I", "stockholm=.",
-                    "-I", "nixpkgs=/var/src/nixpkgs",
-                    "-p" ] + deps + [ "--run" ]
+      nixshell = [
+        "nix-shell",
+        "-I", "stockholm=.",
+        "-I", "nixpkgs=/var/src/nixpkgs",
+        "-p"
+      ] + deps + [ "--run" ]
 
       # prepare addShell function
       def addShell(factory,**kwargs):
         factory.addStep(steps.ShellCommand(**kwargs))
     '';
     builder = {
-      build-all = ''
+      build-hosts = ''
         f = util.BuildFactory()
         f.addStep(grab_repo)
-        for i in [ "mors", "uriel", "shodan", "helios", "cloudkrebs", "echelon", "dishfire", "prism" ]:
-          addShell(f,name="build-{}".format(i),env=env_lass,
-                  command=nixshell + \
-                      ["mkdir -p /tmp/testbuild/$LOGNAME && touch /tmp/testbuild/$LOGNAME/.populate; \
+        for i in [ "test-minimal-deploy", "test-all-krebs-modules", "wolf", "test-centos7" ]:
+            addShell(f,name="build-{}".format(i),env=env_shared,
+                command=nixshell + \
+                    ["mkdir -p /tmp/testbuild/$LOGNAME && touch /tmp/testbuild/$LOGNAME/.populate; \
                         make \
                             test \
                             target=$LOGNAME@${config.krebs.build.host.name}/tmp/testbuild/$LOGNAME \
                             method=build \
-                            system={}".format(i)])
+                            system={}".format(i)
+                    ]
+            )
+
+        for i in [ "mors", "uriel", "shodan", "helios", "cloudkrebs", "echelon", "dishfire", "prism" ]:
+            addShell(f,name="build-{}".format(i),env=env_lass,
+                command=nixshell + \
+                    ["mkdir -p /tmp/testbuild/$LOGNAME && touch /tmp/testbuild/$LOGNAME/.populate; \
+                        make \
+                            test \
+                            target=$LOGNAME@${config.krebs.build.host.name}/tmp/testbuild/$LOGNAME \
+                            method=build \
+                            system={}".format(i)
+                    ]
+            )
 
         for i in [ "x", "wry", "vbob", "wbob", "shoney" ]:
-          addShell(f,name="build-{}".format(i),env=env_makefu,
-                  command=nixshell + \
-                      ["mkdir -p /tmp/testbuild/$LOGNAME && touch /tmp/testbuild/$LOGNAME/.populate; \
+            addShell(f,name="build-{}".format(i),env=env_makefu,
+                command=nixshell + \
+                    ["mkdir -p /tmp/testbuild/$LOGNAME && touch /tmp/testbuild/$LOGNAME/.populate; \
                         make \
                             test \
                             target=$LOGNAME@${config.krebs.build.host.name}/tmp/testbuild/$LOGNAME \
                             method=build \
-                            system={}".format(i)])
+                            system={}".format(i)
+                    ]
+            )
 
-        bu.append(util.BuilderConfig(name="build-all",
-              workernames=workernames,
-              factory=f))
+        bu.append(
+            util.BuilderConfig(
+                name="build-hosts",
+                workernames=workernames,
+                factory=f
+            )
+        )
 
       '';
 
diff --git a/lass/2configs/games.nix b/lass/2configs/games.nix
index 0eec97922..82b7eb2c9 100644
--- a/lass/2configs/games.nix
+++ b/lass/2configs/games.nix
@@ -2,10 +2,28 @@
 
 let
   mainUser = config.users.extraUsers.mainUser;
+  doom = pkgs.writeDash "doom" ''
+    DOOM_DIR=''${DOOM_DIR:-~/doom/}
+    ${pkgs.zandronum}/bin/zandronum \
+      -file $DOOM_DIR/lib/brutalv20.pk3 \
+      -file $DOOM_DIR/lib/RebotStarcraftMarines.pk3 \
+      -fov 120 \
+      "$@"
+  '';
+  doom1 = pkgs.writeDashBin "doom1" ''
+    DOOM_DIR=''${DOOM_DIR:-~/doom/}
+    ${doom} -iwad $DOOM_DIR/wads/stock/doom.wad "$@"
+  '';
+  doom2 = pkgs.writeDashBin "doom2" ''
+    DOOM_DIR=''${DOOM_DIR:-~/doom/}
+    ${doom} -iwad $DOOM_DIR/wads/stock/doom2.wad "$@"
+  '';
 
 in {
   environment.systemPackages = with pkgs; [
     dwarf_fortress
+    doom1
+    doom2
   ];
 
   users.extraUsers = {
diff --git a/lass/2configs/nixpkgs.nix b/lass/2configs/nixpkgs.nix
index caca98746..48472f7a1 100644
--- a/lass/2configs/nixpkgs.nix
+++ b/lass/2configs/nixpkgs.nix
@@ -3,6 +3,6 @@
 {
   krebs.build.source.nixpkgs.git = {
     url = https://github.com/nixos/nixpkgs;
-    ref = "ee52e9809185bdf44452f2913e3f6ef839c15c4e";
+    ref = "e360c7205f84be180d80b97f3980fb809a951486";
   };
 }
diff --git a/lass/2configs/vim.nix b/lass/2configs/vim.nix
index aac2b96d4..bfaae24c8 100644
--- a/lass/2configs/vim.nix
+++ b/lass/2configs/vim.nix
@@ -175,8 +175,8 @@ let
     "Syntastic config
     let g:syntastic_python_checkers=['flake8']
 
-    nmap <esc>q :buffer
-    nmap <M-q> :buffer
+    nmap <esc>q :buffer 
+    nmap <M-q> :buffer 
 
     cnoremap <C-A> <Home>
 
diff --git a/makefu/1systems/x.nix b/makefu/1systems/x.nix
index e1aec360d..6fe3883a1 100644
--- a/makefu/1systems/x.nix
+++ b/makefu/1systems/x.nix
@@ -5,25 +5,39 @@
 
 {
   imports =
-    [ # Include the results of the hardware scan.
+    [ # base
       ../.
-      ../2configs/main-laptop.nix #< base-gui + zsh
+      ../2configs/main-laptop.nix
       ../2configs/laptop-utils.nix
       ../2configs/laptop-backup.nix
 
-      # Krebs
-      #../2configs/disable_v6.nix
-      ../2configs/rad1o.nix
+      # testing
+      #../2configs/elchos/search.nix
+      #../2configs/temp/share-samba.nix
+      # ../2configs/mediawiki.nix
+      # ../2configs/wordpress.nix
+      # ../2configs/nginx/public_html.nix
+      # ../2configs/nginx/icecult.nix
+      ../2configs/laptop-backup.nix
+      #../2configs/temp/elkstack.nix
+      # ../2configs/temp/sabnzbd.nix
+      ../2configs/tinc/siem.nix
+      #../2configs/torrent.nix
 
 
+
+      # Krebs
+      ../2configs/disable_v6.nix
+      ../2configs/tinc/retiolum.nix
+
       # applications
-
       ../2configs/exim-retiolum.nix
       ../2configs/mail-client.nix
       ../2configs/printer.nix
       ../2configs/virtualization.nix
       ../2configs/virtualization-virtualbox.nix
       ../2configs/wwan.nix
+      ../2configs/rad1o.nix
 
       # services
       ../2configs/git/brain-retiolum.nix
@@ -37,19 +51,8 @@
       ../2configs/hw/bcm4352.nix
       # mount points
       ../2configs/fs/sda-crypto-root-home.nix
-      # ../2configs/mediawiki.nix
-      #../2configs/wordpress.nix
-      #../2configs/nginx/public_html.nix
-      ../2configs/nginx/icecult.nix
 
-      ../2configs/tinc/retiolum.nix
       # temporary modules
-      ../2configs/temp/share-samba.nix
-      ../2configs/laptop-backup.nix
-      #../2configs/temp/elkstack.nix
-      # ../2configs/temp/sabnzbd.nix
-      ../2configs/tinc/siem.nix
-      #../2configs/torrent.nix
     ];
   makefu.full-populate = true;