Merge remote-tracking branch 'cd/master'

28 files changed, 278 insertions, 48 deletions

diff --git a/Makefile b/Makefile
index 12a60a90..226c0f29 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,12 @@
 stockholm ?= .
 
+export STOCKHOLM_VERSION ?= $(shell \
+	version=git.$$(git describe --always --dirty); \
+	case $$version in (*-dirty) version=$$version@$$(hostname); esac; \
+	date=$$(date +%y.%m); \
+	printf '%s' "$$date.$$version"; \
+)
+
 ifndef nixos-config
 $(if $(system),,$(error unbound variable: system))
 nixos-config = ./$(LOGNAME)/1systems/$(system).nix
@@ -60,7 +67,8 @@ deploy: ssh ?= ssh
 deploy:
 	$(call execute,populate)
 	$(ssh) $(target_user)@$(target_host) -p $(target_port) \
-		nixos-rebuild switch --show-trace -I $(target_path)
+		env STOCKHOLM_VERSION="$$STOCKHOLM_VERSION" \
+			nixos-rebuild switch --show-trace -I $(target_path)
 
 # usage: make LOGNAME=shared system=wolf eval.config.krebs.build.host.name
 eval eval.:;@$(call evaluate,$${expr-eval})
@@ -75,6 +83,7 @@ install:
 	target_path=/mnt$(target_path) $(call execute,populate)
 	$(ssh) $(target_user)@$(target_host) -p $(target_port) \
 		env NIXOS_CONFIG=$(target_path)/nixos-config \
+				STOCKHOLM_VERSION="$$STOCKHOLM_VERSION" \
 			nixos-install
 
 # usage: make test system=foo [target=bar] [method={eval,build}]
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 186469e9..bdd9049c 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -23,6 +23,7 @@ let
       ./lib.nix
       ./nginx.nix
       ./nixpkgs.nix
+      ./os-release.nix
       ./per-user.nix
       ./Reaktor.nix
       ./realwallpaper.nix
diff --git a/krebs/3modules/exim-retiolum.nix b/krebs/3modules/exim-retiolum.nix
index 6e6928f8..696c48ba 100644
--- a/krebs/3modules/exim-retiolum.nix
+++ b/krebs/3modules/exim-retiolum.nix
@@ -39,6 +39,8 @@ let
         # TODO modular configuration
         assert config.krebs.retiolum.enable;
         ''
+          keep_environment =
+
           primary_hostname = ${cfg.primary_hostname}
           domainlist local_domains = ${concatStringsSep ":" cfg.local_domains}
           domainlist relay_to_domains = ${concatStringsSep ":" cfg.relay_to_domains}
diff --git a/krebs/3modules/exim-smarthost.nix b/krebs/3modules/exim-smarthost.nix
index c976e89d..cee10ce7 100644
--- a/krebs/3modules/exim-smarthost.nix
+++ b/krebs/3modules/exim-smarthost.nix
@@ -12,6 +12,29 @@ let
   api = {
     enable = mkEnableOption "krebs.exim-smarthost";
 
+    dkim = mkOption {
+      type = types.listOf (types.submodule ({ config, ... }: {
+        options = {
+          domain = mkOption {
+            type = types.str;
+          };
+          private_key = mkOption {
+            type = types.secret-file;
+            default = {
+              path = "/run/krebs.secret/${config.domain}.dkim_private_key";
+              owner.name = "exim";
+              source-path = toString <secrets> + "/${config.domain}.dkim.priv";
+            };
+          };
+          selector = mkOption {
+            type = types.str;
+            default = "default";
+          };
+        };
+      }));
+      default = [];
+    };
+
     internet-aliases = mkOption {
       type = types.listOf (types.submodule ({
         options = {
@@ -72,9 +95,21 @@ let
   };
 
   imp = {
+    krebs.secret.files = listToAttrs (flip map cfg.dkim (dkim: {
+      name = "exim.dkim_private_key/${dkim.domain}";
+      value = dkim.private_key;
+    }));
+    systemd.services = mkIf (cfg.dkim != []) {
+      exim = {
+        after = [ "secret.service" ];
+        requires = [ "secret.service" ];
+      };
+    };
     services.exim = {
       enable = true;
       config = ''
+        keep_environment =
+
         primary_hostname = ${cfg.primary_hostname}
 
         # HOST_REDIR contains the real destinations for "local_domains".
@@ -191,6 +226,12 @@ let
 
         remote_smtp:
           driver = smtp
+          ${optionalString (cfg.dkim != []) ''
+            dkim_canon = relaxed
+            dkim_domain = $sender_address_domain
+            dkim_private_key = ''${lookup{$sender_address_domain}lsearch{${lsearch.dkim_private_key}}}
+            dkim_selector = ''${lookup{$sender_address_domain}lsearch{${lsearch.dkim_selector}}}
+          ''}
           helo_data = ''${if eq{$acl_m_special_dom}{}  \
                                {$primary_hostname}   \
                                {$acl_m_special_dom} }
@@ -219,12 +260,20 @@ let
   };
 
 
-  lsearch = mapAttrs (name: set: toFile name (to-lsearch set)) {
+  lsearch = mapAttrs (name: set: toFile name (to-lsearch set)) ({
     inherit (cfg) internet-aliases;
     inherit (cfg) system-aliases;
-  };
-
-  to-lsearch = concatMapStringsSep "\n" ({ from, to, ... }: "${from}: ${to}");
-
-in
-out
+  } // optionalAttrs (cfg.dkim != []) {
+    dkim_private_key = flip map cfg.dkim (dkim: {
+      from = dkim.domain;
+      to = dkim.private_key.path;
+    });
+    dkim_selector = flip map cfg.dkim (dkim: {
+      from = dkim.domain;
+      to = dkim.selector;
+    });
+  });
+
+  to-lsearch = concatMapStrings ({ from, to, ... }: "${from}: ${to}\n");
+
+in out
diff --git a/krebs/3modules/git.nix b/krebs/3modules/git.nix
index 0cc2f11c..d2d73ba3 100644
--- a/krebs/3modules/git.nix
+++ b/krebs/3modules/git.nix
@@ -400,7 +400,7 @@ let
     #! /bin/sh
     set -euf
 
-    PATH=${makeSearchPath "bin" (with pkgs; [
+    PATH=${makeBinPath (with pkgs; [
       coreutils
       git
       gnugrep
@@ -451,7 +451,7 @@ let
     #! /bin/sh
     set -euf
 
-    PATH=${makeSearchPath "bin" (with pkgs; [
+    PATH=${makeBinPath (with pkgs; [
       coreutils
       findutils
       gawk
@@ -511,7 +511,7 @@ let
       #! /bin/sh
       set -euf
 
-      PATH=${makeSearchPath "bin" (with pkgs; [
+      PATH=${makeBinPath (with pkgs; [
         coreutils # env
         git
         systemd
diff --git a/krebs/3modules/nginx.nix b/krebs/3modules/nginx.nix
index 023988dd..196a6eae 100644
--- a/krebs/3modules/nginx.nix
+++ b/krebs/3modules/nginx.nix
@@ -77,7 +77,6 @@ let
     services.nginx = {
       enable = true;
       httpConfig = ''
-        include           ${pkgs.nginx}/conf/mime.types;
         default_type      application/octet-stream;
         sendfile          on;
         keepalive_timeout 65;
diff --git a/krebs/3modules/os-release.nix b/krebs/3modules/os-release.nix
new file mode 100644
index 00000000..4c803fff
--- /dev/null
+++ b/krebs/3modules/os-release.nix
@@ -0,0 +1,28 @@
+{ config, ... }:
+with config.krebs.lib;
+let
+  nixos-version-id = "${config.system.nixosVersion}";
+  nixos-version = "${nixos-version-id} (${config.system.nixosCodeName})";
+  nixos-pretty-name = "NixOS ${nixos-version}";
+
+  stockholm-version-id = maybeEnv "STOCKHOLM_VERSION" "unknown";
+  stockholm-version = "${stockholm-version-id}";
+  stockholm-pretty-name = "stockholm ${stockholm-version}";
+
+  version = "${stockholm-version}/${nixos-version}";
+  version-id = "${stockholm-version-id}/${nixos-version-id}";
+  pretty-name = "${stockholm-pretty-name} / ${nixos-pretty-name}";
+
+  home-url = http://cgit.cd.krebsco.de/stockholm;
+in
+{
+  # http://0pointer.de/public/systemd-man/os-release.html
+  environment.etc."os-release".text = mkForce ''
+    NAME="stockholm/NixOS"
+    ID=stockholm
+    VERSION="${version}"
+    VERSION_ID="${version-id}"
+    PRETTY_NAME="${pretty-name}"
+    HOME_URL="${home-url}"
+  '';
+}
diff --git a/krebs/5pkgs/builders.nix b/krebs/5pkgs/builders.nix
index fa51857b..146e6f9e 100644
--- a/krebs/5pkgs/builders.nix
+++ b/krebs/5pkgs/builders.nix
@@ -29,7 +29,7 @@ rec {
   execveBin = name: cfg: execve name (cfg // { destination = "/bin/${name}"; });
 
   writeC = name: { destination ? "" }: src: pkgs.runCommand name {} ''
-    PATH=${makeSearchPath "bin" (with pkgs; [
+    PATH=${makeBinPath (with pkgs; [
       binutils
       coreutils
       gcc
diff --git a/krebs/5pkgs/cac-api/default.nix b/krebs/5pkgs/cac-api/default.nix
index 52ada4f1..85a906e1 100644
--- a/krebs/5pkgs/cac-api/default.nix
+++ b/krebs/5pkgs/cac-api/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
     mkdir -p $out/bin
     { cat <<\EOF
     #! ${dash}/bin/dash
-    export PATH=${stdenv.lib.makeSearchPath "bin" [
+    export PATH=${stdenv.lib.makeBinPath [
       bc
       coreutils
       curl
diff --git a/krebs/5pkgs/cgit/default.nix b/krebs/5pkgs/cgit/default.nix
new file mode 100644
index 00000000..3180a5bd
--- /dev/null
+++ b/krebs/5pkgs/cgit/default.nix
@@ -0,0 +1,64 @@
+{ stdenv, fetchurl, openssl, zlib, asciidoc, libxml2, libxslt
+, docbook_xml_xslt, pkgconfig, luajit
+, gzip, bzip2, xz
+}:
+
+stdenv.mkDerivation rec {
+  name = "cgit-${version}";
+  version = "0.12";
+
+  src = fetchurl {
+    url = "http://git.zx2c4.com/cgit/snapshot/${name}.tar.xz";
+    sha256 = "1dx54hgfyabmg9nm5qp6d01f54nlbqbbdwhwl0llb9imjf237qif";
+  };
+
+  # cgit is tightly coupled with git and needs a git source tree to build.
+  # IMPORTANT: Remember to check which git version cgit needs on every version
+  # bump (look in the Makefile).
+  # NOTE: as of 0.10.1, the git version is compatible from 1.9.0 to
+  # 1.9.2 (see the repository history)
+  gitSrc = fetchurl {
+    url    = "mirror://kernel/software/scm/git/git-2.7.2.tar.xz";
+    sha256 = "086ga30ksijfxad085ply83ddf955d2b8qxph5sw6c9hab77j15j";
+  };
+
+  buildInputs = [
+    openssl zlib asciidoc libxml2 libxslt docbook_xml_xslt pkgconfig luajit
+  ];
+
+  postPatch = ''
+    sed -e 's|"gzip"|"${gzip}/bin/gzip"|' \
+        -e 's|"bzip2"|"${bzip2}/bin/bzip2"|' \
+        -e 's|"xz"|"${xz}/bin/xz"|' \
+        -i ui-snapshot.c
+  '';
+
+  # Give cgit a git source tree and pass configuration parameters (as make
+  # variables).
+  preBuild = ''
+    mkdir -p git
+    tar --strip-components=1 -xf "$gitSrc" -C git
+
+    makeFlagsArray+=(prefix="$out" CGIT_SCRIPT_PATH="$out/cgit/")
+  '';
+
+  # Install manpage.
+  postInstall = ''
+    # xmllint fails:
+    #make install-man
+
+    # bypassing xmllint works:
+    a2x --no-xmllint -f manpage cgitrc.5.txt
+    mkdir -p "$out/share/man/man5"
+    cp cgitrc.5 "$out/share/man/man5"
+  '';
+
+  meta = {
+    homepage = http://git.zx2c4.com/cgit/about/;
+    repositories.git = git://git.zx2c4.com/cgit;
+    description = "Web frontend for git repositories";
+    license = stdenv.lib.licenses.gpl2;
+    platforms = stdenv.lib.platforms.linux;
+    maintainers = with stdenv.lib.maintainers; [ bjornfor ];
+  };
+}
diff --git a/krebs/5pkgs/default.nix b/krebs/5pkgs/default.nix
index f7997dd6..0c39324a 100644
--- a/krebs/5pkgs/default.nix
+++ b/krebs/5pkgs/default.nix
@@ -1,7 +1,20 @@
 { config, lib, pkgs, ... }@args:
 with config.krebs.lib;
 {
-  nixpkgs.config.packageOverrides = pkgs: {
+  nixpkgs.config.packageOverrides = pkgs: let
+
+    # This callPackage will try to detect obsolete overrides.
+    callPackage = path: args: let
+      override = pkgs.callPackage path args;
+      upstream = optionalAttrs (override ? "name")
+        (pkgs.${(parseDrvName override.name).name} or {});
+    in if upstream ? "name" &&
+          override ? "name" &&
+          compareVersions upstream.name override.name != -1
+      then trace "Upstream `${upstream.name}' gets overridden by `${override.name}'." override
+      else override;
+
+  in {
     haskellPackages = pkgs.haskellPackages.override {
       overrides = self: super:
         mapAttrs (name: path: self.callPackage path {})
@@ -16,18 +29,18 @@ with config.krebs.lib;
             (builtins.readDir ./haskell-overrides));
     };
 
-    push = pkgs.callPackage ./push {
+    push = callPackage ./push {
       inherit (subdirs) get;
     };
 
-    ReaktorPlugins = pkgs.callPackage ./Reaktor/plugins.nix {};
+    ReaktorPlugins = callPackage ./Reaktor/plugins.nix {};
 
     test = {
-      infest-cac-centos7 = pkgs.callPackage ./test/infest-cac-centos7 {};
+      infest-cac-centos7 = callPackage ./test/infest-cac-centos7 {};
     };
   }
   // import ./builders.nix args
-  // mapAttrs (_: flip pkgs.callPackage {})
+  // mapAttrs (_: flip callPackage {})
               (filterAttrs (_: dir.has-default-nix)
                            (subdirsOf ./.));
 }
diff --git a/krebs/5pkgs/dic/default.nix b/krebs/5pkgs/dic/default.nix
index 571773d2..3566de8c 100644
--- a/krebs/5pkgs/dic/default.nix
+++ b/krebs/5pkgs/dic/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
 
   installPhase =
     let
-      path = stdenv.lib.makeSearchPath "bin" [
+      path = stdenv.lib.makeBinPath [
         coreutils
         curl
         gnused
diff --git a/krebs/5pkgs/exim/default.nix b/krebs/5pkgs/exim/default.nix
new file mode 100644
index 00000000..d8d1f0dc
--- /dev/null
+++ b/krebs/5pkgs/exim/default.nix
@@ -0,0 +1,63 @@
+{ coreutils, fetchurl, db, openssl, pcre, perl, pkgconfig, stdenv }:
+
+stdenv.mkDerivation rec {
+  name = "exim-4.86.2";
+
+  src = fetchurl {
+    url = "http://mirror.switch.ch/ftp/mirror/exim/exim/exim4/${name}.tar.bz2";
+    sha256 = "1cvfcc1hi60lydv8h3a2rxlfc0v2nflwpvzjj7h7cdsqs2pxwmkp";
+  };
+
+  buildInputs = [ coreutils db openssl pcre perl pkgconfig ];
+
+  preBuild = ''
+    sed '
+      s:^\(BIN_DIRECTORY\)=.*:\1='"$out"'/bin:
+      s:^\(CONFIGURE_FILE\)=.*:\1=/etc/exim.conf:
+      s:^\(EXIM_USER\)=.*:\1=ref\:nobody:
+      s:^\(SPOOL_DIRECTORY\)=.*:\1=/exim-homeless-shelter:
+      s:^# \(SUPPORT_MAILDIR\)=.*:\1=yes:
+      s:^EXIM_MONITOR=.*$:# &:
+      s:^\(FIXED_NEVER_USERS\)=root$:\1=0:
+      s:^# \(WITH_CONTENT_SCAN\)=.*:\1=yes:
+      s:^# \(AUTH_PLAINTEXT\)=.*:\1=yes:
+      s:^# \(SUPPORT_TLS\)=.*:\1=yes:
+      s:^# \(USE_OPENSSL_PC=openssl\)$:\1:
+      s:^# \(LOG_FILE_PATH=syslog\)$:\1:
+      s:^# \(HAVE_IPV6=yes\)$:\1:
+      s:^# \(CHOWN_COMMAND\)=.*:\1=${coreutils}/bin/chown:
+      s:^# \(CHGRP_COMMAND\)=.*:\1=${coreutils}/bin/chgrp:
+      s:^# \(CHMOD_COMMAND\)=.*:\1=${coreutils}/bin/chmod:
+      s:^# \(MV_COMMAND\)=.*:\1=${coreutils}/bin/mv:
+      s:^# \(RM_COMMAND\)=.*:\1=${coreutils}/bin/rm:
+      s:^# \(TOUCH_COMMAND\)=.*:\1=${coreutils}/bin/touch:
+      s:^# \(PERL_COMMAND\)=.*:\1=${perl}/bin/perl:
+      #/^\s*#.*/d
+      #/^\s*$/d
+    ' < src/EDITME > Local/Makefile
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin $out/share/man/man8
+    cp doc/exim.8 $out/share/man/man8
+
+    ( cd build-Linux-*
+      cp exicyclog exim_checkaccess exim_dumpdb exim_lock exim_tidydb \
+        exipick exiqsumm exigrep exim_dbmbuild exim exim_fixdb eximstats \
+        exinext exiqgrep exiwhat \
+        $out/bin )
+
+    ( cd $out/bin
+      for i in mailq newaliases rmail rsmtp runq sendmail; do
+        ln -s exim $i
+      done )
+  '';
+
+  meta = {
+    homepage = http://exim.org/;
+    description = "A mail transfer agent (MTA)";
+    license = stdenv.lib.licenses.gpl3;
+    platforms = stdenv.lib.platforms.linux;
+    maintainers = [ stdenv.lib.maintainers.tv ];
+  };
+}
diff --git a/krebs/5pkgs/fortclientsslvpn/default.nix b/krebs/5pkgs/fortclientsslvpn/default.nix
index e1c81347..602766f4 100644
--- a/krebs/5pkgs/fortclientsslvpn/default.nix
+++ b/krebs/5pkgs/fortclientsslvpn/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ makeWrapper ];
 
-  binPath = lib.makeSearchPath "bin" [
+  binPath = lib.makeBinPath [
     coreutils
     gawk
   ];
diff --git a/krebs/5pkgs/get/default.nix b/krebs/5pkgs/get/default.nix
index 13cdeca9..f82c7e8b 100644
--- a/krebs/5pkgs/get/default.nix
+++ b/krebs/5pkgs/get/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
 
   installPhase =
     let
-      path = stdenv.lib.makeSearchPath "bin" [
+      path = stdenv.lib.makeBinPath [
         coreutils
         gnugrep
         gnused
diff --git a/krebs/5pkgs/git-hooks/default.nix b/krebs/5pkgs/git-hooks/default.nix
index 5697c31b..3aba9053 100644
--- a/krebs/5pkgs/git-hooks/default.nix
+++ b/krebs/5pkgs/git-hooks/default.nix
@@ -12,7 +12,7 @@ let
     #! /bin/sh
     set -euf
 
-    export PATH=${makeSearchPath "bin" (with pkgs; [
+    export PATH=${makeBinPath (with pkgs; [
       coreutils
       git
       gnused
diff --git a/krebs/5pkgs/github-hosts-sync/default.nix b/krebs/5pkgs/github-hosts-sync/default.nix
index b9dcfa9b..0dcbe7fd 100644
--- a/krebs/5pkgs/github-hosts-sync/default.nix
+++ b/krebs/5pkgs/github-hosts-sync/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   installPhase =
     let
       ca-bundle = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
-      path = stdenv.lib.makeSearchPath "bin" (with pkgs; [
+      path = stdenv.lib.makeBinPath (with pkgs; [
         coreutils
         findutils
         git
diff --git a/krebs/5pkgs/hashPassword/default.nix b/krebs/5pkgs/hashPassword/default.nix
index a10340cc..6a7c51c5 100644
--- a/krebs/5pkgs/hashPassword/default.nix
+++ b/krebs/5pkgs/hashPassword/default.nix
@@ -5,7 +5,7 @@ pkgs.writeScriptBin "hashPassword" ''
   # usage: hashPassword
   set -euf
 
-  export PATH=${lib.makeSearchPath "bin" (with pkgs; [
+  export PATH=${lib.makeBinPath (with pkgs; [
     coreutils
     mkpasswd
     openssl
diff --git a/krebs/5pkgs/nq/default.nix b/krebs/5pkgs/nq/default.nix
deleted file mode 100644
index 0f397a43..00000000
--- a/krebs/5pkgs/nq/default.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{ fetchgit, stdenv }:
-
-stdenv.mkDerivation rec {
-  name = "nq-${rev}";
-  rev = "0eae839cb1";
-
-  src = fetchgit {
-    url = https://github.com/chneukirchen/nq;
-    inherit rev;
-    sha256 = "1150274750cde934932d65bd6053d7a0ba2404a59eadfb87fc6bd8a4fb70febb";
-  };
-
-  configurePhase = ''
-    sed -i "s:^PREFIX=.*:PREFIX=$out:" Makefile
-  '';
-}
diff --git a/krebs/5pkgs/push/default.nix b/krebs/5pkgs/push/default.nix
index aa17a21a..9a627fe3 100644
--- a/krebs/5pkgs/push/default.nix
+++ b/krebs/5pkgs/push/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
 
   installPhase =
     let
-      path = lib.makeSearchPath "bin" [
+      path = lib.makeBinPath [
         coreutils
         git
         gnumake
diff --git a/mv/1systems/stro.nix b/mv/1systems/stro.nix
index f251cb09..520bf14e 100644
--- a/mv/1systems/stro.nix
+++ b/mv/1systems/stro.nix
@@ -56,7 +56,6 @@ with config.krebs.lib;
         netcat
         nix-repl
         nmap
-        nq
         p7zip
         pass
         posix_man_pages
diff --git a/tv/1systems/nomic.nix b/tv/1systems/nomic.nix
index fa9c9081..fed67a10 100644
--- a/tv/1systems/nomic.nix
+++ b/tv/1systems/nomic.nix
@@ -12,7 +12,7 @@ with config.krebs.lib;
     ../2configs/git.nix
     ../2configs/im.nix
     ../2configs/mail-client.nix
-    ../2configs/nginx-public_html.nix
+    ../2configs/nginx/public_html.nix
     ../2configs/pulse.nix
     ../2configs/retiolum.nix
     ../2configs/wu-binary-cache/client.nix
diff --git a/tv/1systems/wu.nix b/tv/1systems/wu.nix
index 0bf24210..27dd1252 100644
--- a/tv/1systems/wu.nix
+++ b/tv/1systems/wu.nix
@@ -13,7 +13,7 @@ with config.krebs.lib;
     ../2configs/im.nix
     ../2configs/mail-client.nix
     ../2configs/man.nix
-    ../2configs/nginx-public_html.nix
+    ../2configs/nginx/public_html.nix
     ../2configs/pulse.nix
     ../2configs/retiolum.nix
     ../2configs/wu-binary-cache
@@ -46,7 +46,6 @@ with config.krebs.lib;
         netcat
         nix-repl
         nmap
-        nq
         p7zip
         push
         qrencode
diff --git a/tv/1systems/xu.nix b/tv/1systems/xu.nix
index 46fb59ff..96a0545a 100644
--- a/tv/1systems/xu.nix
+++ b/tv/1systems/xu.nix
@@ -12,7 +12,7 @@ with config.krebs.lib;
     ../2configs/git.nix
     ../2configs/mail-client.nix
     ../2configs/man.nix
-    ../2configs/nginx-public_html.nix
+    ../2configs/nginx/public_html.nix
     ../2configs/pulse.nix
     ../2configs/retiolum.nix
     ../2configs/wu-binary-cache/client.nix
@@ -58,7 +58,6 @@ with config.krebs.lib;
         netcat
         nix-repl
         nmap
-        nq
         p7zip
         pass
         qrencode
diff --git a/tv/2configs/default.nix b/tv/2configs/default.nix
index 0a3e40a5..df5d5da2 100644
--- a/tv/2configs/default.nix
+++ b/tv/2configs/default.nix
@@ -26,6 +26,7 @@ with config.krebs.lib;
   imports = [
     <secrets>
     ./backup.nix
+    ./nginx
     ./vim.nix
     {
       # stockholm dependencies
diff --git a/tv/2configs/exim-smarthost.nix b/tv/2configs/exim-smarthost.nix
index 3ea01052..280d8572 100644
--- a/tv/2configs/exim-smarthost.nix
+++ b/tv/2configs/exim-smarthost.nix
@@ -5,6 +5,9 @@ with config.krebs.lib;
 {
   krebs.exim-smarthost = {
     enable = true;
+    dkim = [
+      { domain = "viljetic.de"; }
+    ];
     sender_domains = [
       "krebsco.de"
       "shackspace.de"
diff --git a/tv/2configs/nginx/default.nix b/tv/2configs/nginx/default.nix
new file mode 100644
index 00000000..1fac65a3
--- /dev/null
+++ b/tv/2configs/nginx/default.nix
@@ -0,0 +1,17 @@
+{ config, lib, ... }:
+
+with config.krebs.lib;
+
+{
+  krebs.nginx = {
+    servers.default.locations = [
+      (nameValuePair "= /etc/os-release" ''
+        default_type text/plain;
+        alias /etc/os-release;
+      '')
+    ];
+  };
+  tv.iptables = optionalAttrs config.krebs.nginx.enable {
+    input-retiolum-accept-new-tcp = singleton "http";
+  };
+}
diff --git a/tv/2configs/nginx-public_html.nix b/tv/2configs/nginx/public_html.nix
index 15a3b548..15a3b548 100644
--- a/tv/2configs/nginx-public_html.nix
+++ b/tv/2configs/nginx/public_html.nix