diff --git a/Makefile b/Makefile
index 05780f80e..3727793e8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 # usage:
 #		make system=foo
 #		make systems='foo bar'
-#		make eval system=foo get=config.networking.extraHosts [filter=json]
+#		make eval get=tv.wu.config.time.timeZone [filter=json]
 #
 
 .ONESHELL:
@@ -10,20 +10,19 @@
 
 ifdef systems
 $(systems):
+	@
 	parallel \
 		--line-buffer \
 		-j0 \
 		--no-notice \
 		--tagstring {} \
-		-q make systems= system={} ::: $(systems)
+		-q make -s systems= system={} ::: $(systems)
 else ifdef system
-.PHONY: deploy
-deploy:;@
-	make -s eval system=$(system) get=config.krebs.build.script filter=json | sh
-
-.PHONY: infest
-infest:;@
-	make -s eval system=$(system) get=config.krebs.build.infest filter=json | sh
+.PHONY: deploy infest
+deploy infest:;@
+	export get=$$LOGNAME.${system}.config.krebs.build.scripts.$@
+	export filter=json
+	make -s eval | sh
 
 .PHONY: eval
 eval:
@@ -41,7 +40,7 @@ endif
 		-A "$$get" \
 		'<stockholm>' \
 		--argstr user-name "$$LOGNAME" \
-		--argstr system-name "$$system" \
+		--argstr host-name "$$HOSTNAME" \
 		| filter
 else
 $(error unbound variable: system[s])
diff --git a/default.nix b/default.nix
index 875f0d5b4..64c69a2f4 100644
--- a/default.nix
+++ b/default.nix
@@ -1,26 +1,81 @@
-{ user-name, system-name }:
+{ user-name, host-name }:
 
 let
+  lib = import <nixpkgs/lib>;
 
-  eval = import <nixpkgs/nixos/lib/eval-config.nix> {
+  krebs-modules-path = ./krebs/3modules;
+  krebs-pkgs-path = ./krebs/5pkgs;
+  user-modules-path = ./. + "/${user-name}/3modules";
+  user-pkgs-path = ./. + "/${user-name}/5pkgs";
+
+  out =
+    (lib.mapAttrs (k: v: mk-namespace (./. + "/${k}"))
+      (lib.filterAttrs
+        (k: v: !lib.hasPrefix "." k && v == "directory")
+        (builtins.readDir ./.)));
+
+  eval = path: import <nixpkgs/nixos/lib/eval-config.nix> {
     system = builtins.currentSystem;
-    modules = map (p: ./. + "/${p}") [
-      "${user-name}/1systems/${system-name}.nix"
-      "${user-name}/3modules"
-      "krebs/3modules"
+    modules = [
+      ({ config, ... }:
+        with import ./krebs/4lib { inherit lib; };
+        {
+          options.krebs.exec.host = mkOption {
+            type = types.host;
+            default = config.krebs.hosts.${host-name};
+          };
+          options.krebs.exec.user = mkOption {
+            type = types.user;
+            default = config.krebs.users.${user-name};
+          };
+        }
+      )
+      path
+      krebs-modules-path
+      user-modules-path
     ] ++ [
-      ({ lib, pkgs, ... }: {
+      ({ config, lib, pkgs, ... }@args: {
        _module.args.pkgs =
-         (import ./krebs/5pkgs { inherit lib pkgs; }) //
-         (import (./. + "/${user-name}/5pkgs") { inherit lib pkgs; });
+         (import krebs-pkgs-path args) //
+         (import user-pkgs-path args);
       })
     ];
   };
 
-in
+  mk-namespace = path: mapNixDir mk-system (path + "/1systems");
 
-{
-  inherit (eval) config options;
+  mk-system = path: rec {
+    inherit (eval path) config options;
+    system = config.system.build.toplevel;
+    fetch = import ./krebs/0tools/fetch.nix { inherit config lib; };
+  };
 
-  system = eval.config.system.build.toplevel;
-}
+  mapNixDir = f: path: lib.mapAttrs (_: f) (nixDir path);
+
+  nixDir = path:
+    builtins.listToAttrs
+      (catMaybes
+        (lib.mapAttrsToList
+          (k: v: {
+            directory =
+              let p = path + "/${k}/default.nix"; in
+              if builtins.pathExists p
+                then Just (lib.nameValuePair k p)
+                else Nothing;
+            regular =
+              let p = path + "/${k}"; in
+              if lib.hasSuffix ".nix" p
+                then Just (lib.nameValuePair (lib.removeSuffix ".nix" k) p)
+                else Nothing;
+          }.${v} or Nothing)
+          (builtins.readDir path)));
+
+  # TODO move to lib
+  Just = x: { type = "maybe"; value = x; };
+  Nothing = { type = "maybe"; };
+  isMaybe = x: builtins.typeOf x == "set" && x.type or false == "maybe";
+  isJust = x: isMaybe x && builtins.hasAttr "value" x;
+  fromJust = x: assert isJust x; x.value;
+  catMaybes = xs: map fromJust (builtins.filter isJust xs);
+
+in out
diff --git a/krebs/3modules/build/default.nix b/krebs/3modules/build/default.nix
new file mode 100644
index 000000000..d6ee5c917
--- /dev/null
+++ b/krebs/3modules/build/default.nix
@@ -0,0 +1,264 @@
+{ config, lib, ... }:
+
+with import ../../4lib { inherit lib; };
+
+let
+  target = config.krebs.build // { user.name = "root"; };
+
+  out = {
+    # TODO deprecate krebs.build.host
+    options.krebs.build.host = mkOption {
+      type = types.host;
+    };
+
+    # TODO make krebs.build.profile shell safe
+    options.krebs.build.profile = mkOption {
+      type = types.str;
+      default = "/nix/var/nix/profiles/system";
+    };
+
+    # TODO make krebs.build.target.host :: host
+    options.krebs.build.target = mkOption {
+      type = with types; nullOr str;
+      default = null;
+    };
+
+    # TODO deprecate krebs.build.user
+    options.krebs.build.user = mkOption {
+      type = types.user;
+    };
+
+    options.krebs.build.scripts.deploy = lib.mkOption {
+      type = lib.types.str;
+      default = ''
+        set -efu
+        (${config.krebs.build.scripts._source})
+        ${ssh-target ''
+          ${config.krebs.build.scripts._nix-env}
+          ${config.krebs.build.profile}/bin/switch-to-configuration switch
+        ''}
+        echo OK
+      '';
+    };
+
+    options.krebs.build.scripts.infest = lib.mkOption {
+      type = lib.types.str;
+      default = ''
+        set -efu
+
+        export RSYNC_RSH; RSYNC_RSH="$(type -p ssh) \
+          -o 'HostName ${target.host.infest.addr}' \
+          -o 'Port ${toString target.host.infest.port}' \
+        "
+        ssh() {
+          eval "$RSYNC_RSH \"\$@\""
+        }
+
+        ${ssh-target ''
+          ${readFile ./infest/prepare.sh}
+          ${readFile ./infest/install-nix.sh}
+        ''}
+
+        (${config.krebs.build.scripts._source})
+
+        ${ssh-target ''
+          export PATH; PATH=/root/.nix-profile/bin:$PATH
+
+          src=$(type -p nixos-install)
+          cat_src() {
+            sed < "$src" "$(
+              sed < "$src" -n '
+                  /^if ! test -e "\$mountPoint\/\$NIXOS_CONFIG/,/^fi$/=
+                  /^nixpkgs=/=
+                  /^NIX_PATH=/,/^$/{/./=}
+                ' \
+                | sed 's:$:s/^/#krebs#/:'
+            )"
+          }
+
+          # Location to insert config.krebs.build.scripts._nix-env
+          i=$(sed -n '/^echo "building the system configuration/=' "$src")
+
+          {
+            cat_src | sed -n "1,$i{p}"
+            cat ${doc config.krebs.build.scripts._nix-env}
+            cat_src | sed -n "$i,\''${$i!p}"
+          } > nixos-install
+          chmod +x nixos-install
+
+          # Wrap inserted config.krebs.build.scripts._nix-env into chroot.
+          nix_env=$(cat_src | sed -n '
+            s:.*\(/nix/store/[a-z0-9]*-nix-[0-9.]\+/bin/nix-env\).*:\1:p;T;q
+          ')
+          echo nix-env is $nix_env
+          sed -i '
+            s:^nix-env:chroot $mountPoint '"$nix_env"':
+          ' nixos-install
+
+          ./nixos-install
+
+          ${readFile ./infest/finalize.sh}
+        ''}
+      '';
+    };
+
+    options.krebs.build.scripts._nix-env = lib.mkOption {
+      type = lib.types.str;
+      default = ''
+        set -efu
+        NIX_PATH=${config.krebs.build.source.NIX_PATH} \
+        nix-env \
+          -f '<stockholm>' \
+          -Q \
+          --argstr user-name ${config.krebs.exec.user.name} \
+          --argstr host-name ${target.host.name} \
+          --profile ${config.krebs.build.profile} \
+          --set \
+          -A ${lib.escapeShellArg (lib.concatStringsSep "." [
+                config.krebs.build.user.name
+                config.krebs.build.host.name
+                "system"
+              ])}
+      '';
+    };
+
+    options.krebs.build.scripts._source = lib.mkOption {
+      type = lib.types.str;
+      default = ''
+        set -efu
+        ${
+          lib.concatStringsSep "\n"
+            (lib.mapAttrsToList
+              (name: { scripts, url, ... }: "(${scripts._source})")
+              (config.krebs.build.source.dir //
+               config.krebs.build.source.git))
+        }
+      '';
+    };
+
+    options.krebs.build.source.NIX_PATH = mkOption {
+      type = types.str;
+      default =
+        lib.concatStringsSep ":"
+          (lib.mapAttrsToList (name: _: "${name}=/root/${name}")
+            (config.krebs.build.source.dir //
+             config.krebs.build.source.git));
+    };
+
+    options.krebs.build.source.dir = mkOption {
+      type =
+        let
+          exec = config.krebs.exec;
+        in
+        types.attrsOf (types.submodule ({ config, ... }:
+          let
+            url = "file://${config.host.name}${config.path}";
+
+            can-link = config.host.name == target.host.name;
+            can-push = config.host.name == exec.host.name;
+
+            push-method = ''
+              rsync \
+                --exclude .git \
+                --exclude .graveyard \
+                --exclude old \
+                --exclude tmp \
+                --rsync-path='mkdir -p ${config.target-path} && rsync' \
+                --delete-excluded \
+                -vrLptgoD \
+                ${config.path}/ \
+                ${target.user.name}@${target.host.name}:${config.target-path}
+            '';
+          in
+          {
+            options = {
+              host = mkOption {
+                type = types.host;
+              };
+              path = mkOption {
+                type = types.str;
+              };
+              scripts._source = mkOption {
+                type = types.str;
+                default =
+                  #if can-link then link-method else
+                  if can-push then push-method else
+                  throw "cannot source ${url}";
+              };
+              target-path = mkOption {
+                type = types.str;
+                default = "/root/${config._module.args.name}";
+              };
+              url = mkOption {
+                type = types.str;
+                default = "file://${config.host.name}${config.path}";
+              };
+            };
+          }
+        ));
+      default = {};
+    };
+
+    options.krebs.build.source.git = mkOption {
+      type =
+        let
+          target = config.krebs.build // { user.name = "root"; };
+        in
+        with types; attrsOf (submodule ({ config, ... }:
+          {
+            options = {
+              url = mkOption {
+                type = types.str; # TODO must be shell safe
+              };
+              rev = mkOption {
+                type = types.str;
+              };
+              scripts._source = mkOption {
+                type = types.str;
+                default = ssh-target ''
+                  mkdir -p ${config.target-path}
+                  cd ${config.target-path}
+                  if ! test -e .git; then
+                    git init
+                  fi
+                  if ! cur_url=$(git config remote.origin.url 2>/dev/null); then
+                    git remote add origin ${config.url}
+                  elif test "$cur_url" != ${config.url}; then
+                    git remote set-url origin ${config.url}
+                  fi
+                  if test "$(git rev-parse --verify HEAD 2>/dev/null)" != ${config.rev}; then
+                    git fetch origin
+                    git checkout ${config.rev} -- .
+                    git checkout -q ${config.rev}
+                    git submodule init
+                    git submodule update
+                  fi
+                  git clean -dxf
+                '';
+              };
+              target-path = mkOption {
+                type = types.str;
+                default = "/root/${config._module.args.name}";
+              };
+            };
+          }
+      ));
+      default = {};
+    };
+  };
+
+  doc = s:
+    let b = "EOF${hashString "sha256" s}"; in
+    ''
+    <<\${b}
+    ${s}
+    ${b}
+    '';
+
+  ssh-target = script:
+    "ssh root@${target.host.name} -T ${doc ''
+      set -efu
+      ${script}
+    ''}";
+
+in out
diff --git a/krebs/4lib/infest/4finalize b/krebs/3modules/build/infest/finalize.sh
similarity index 92%
rename from krebs/4lib/infest/4finalize
rename to krebs/3modules/build/infest/finalize.sh
index d095fa31b..ced5a4d4d 100644
--- a/krebs/4lib/infest/4finalize
+++ b/krebs/3modules/build/infest/finalize.sh
@@ -7,7 +7,7 @@ set -eux
   umount /mnt || [ $? -eq 32 ]
   umount /boot || [ $? -eq 32 ]
 
-  PATH=$(for i in /nix/store/*coreutils*/bin; do :; done; echo $i)
+  PATH=$(set +f; for i in /nix/store/*coreutils*/bin; do :; done; echo $i)
   export PATH
 
   mkdir /oldshit
diff --git a/krebs/4lib/infest/2install-nix b/krebs/3modules/build/infest/install-nix.sh
similarity index 89%
rename from krebs/4lib/infest/2install-nix
rename to krebs/3modules/build/infest/install-nix.sh
index 3021c1143..88c8c3e1e 100644
--- a/krebs/4lib/infest/2install-nix
+++ b/krebs/3modules/build/infest/install-nix.sh
@@ -2,9 +2,9 @@
 set -efu
 
 nix_url=https://nixos.org/releases/nix/nix-1.10/nix-1.10-x86_64-linux.tar.bz2
-nix_sha256="504f7a3a85fceffb8766ae5e1005de9e02e489742f5a63cc3e7552120b138bf4"
+nix_sha256=504f7a3a85fceffb8766ae5e1005de9e02e489742f5a63cc3e7552120b138bf4
 
-install-nix() {(
+install_nix() {(
 
   # install nix on host (cf. https://nixos.org/nix/install)
   if ! test -e /root/.nix-profile/etc/profile.d/nix.sh; then
@@ -23,7 +23,7 @@ install-nix() {(
     $nix_src_dir/install
   fi
 
-  #TODO: make this general or move to 1prepare
+  #TODO: make this general or move to prepare
   if ! mount | grep -Fq '/dev/mapper/centos-root on /mnt/nix type xfs'; then
     mkdir -p /mnt/nix
     mount --bind /nix /mnt/nix
@@ -54,4 +54,4 @@ install-nix() {(
   fi
 )}
 
-install-nix "$@"
+install_nix "$@"
diff --git a/krebs/4lib/infest/1prepare b/krebs/3modules/build/infest/prepare.sh
similarity index 100%
rename from krebs/4lib/infest/1prepare
rename to krebs/3modules/build/infest/prepare.sh
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 0ffdec5f8..5fb129747 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -6,6 +6,7 @@ let
 
   out = {
     imports = [
+      ./build
       ./exim-retiolum.nix
       ./exim-smarthost.nix
       ./github-hosts-sync.nix
@@ -22,225 +23,6 @@ let
   api = {
     enable = mkEnableOption "krebs";
 
-    build = mkOption {
-      type = types.submodule ({ config, ... }: {
-        options = {
-          target = mkOption {
-            type = with types; nullOr str;
-            default = null;
-          };
-          deps = mkOption {
-            type = with types; attrsOf (submodule {
-              options = {
-                url = mkOption {
-                  type = str;
-                };
-                rev = mkOption {
-                  type = nullOr str;
-                  default = null;
-                };
-              };
-            });
-            default = {};
-          };
-          script = mkOption {
-            type = types.str;
-            default = ''
-              #! /bin/sh
-              set -efux
-
-              target=${escapeShellArg cfg.build.target}
-
-              push(){(
-                src=$1/
-                dst=$target:$2
-                rsync \
-                  --exclude .git \
-                  --exclude .graveyard \
-                  --exclude old \
-                  --rsync-path="mkdir -p \"$2\" && rsync" \
-                  --delete-excluded \
-                  -vrLptgoD \
-                  "$src" "$dst"
-              )}
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev == null) ''
-                  push ${toString (map escapeShellArg [
-                    "${url}"
-                    "/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              exec ssh -S none "$target" /bin/sh <<\EOF
-              set -efux
-              fetch(){(
-                url=$1
-                rev=$2
-                dst=$3
-                mkdir -p "$dst"
-                cd "$dst"
-                if ! test -e .git; then
-                  git init
-                fi
-                if ! cur_url=$(git config remote.origin.url 2>/dev/null); then
-                  git remote add origin "$url"
-                elif test "$cur_url" != "$url"; then
-                  git remote set-url origin "$url"
-                fi
-                if test "$(git rev-parse --verify HEAD 2>/dev/null)" != "$rev"; then
-                  git fetch origin
-                  git checkout "$rev" -- .
-                  git checkout -q "$rev"
-                  git submodule init
-                  git submodule update
-                fi
-                git clean -dxf
-              )}
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev != null) ''
-                  fetch ${toString (map escapeShellArg [
-                    url
-                    rev
-                    "/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              echo build system...
-              profile=/nix/var/nix/profiles/system
-              NIX_PATH=/root/src \
-              nix-env \
-                -Q \
-                -p "$profile" \
-                -f '<stockholm>' \
-                --set \
-                -A system \
-                --argstr user-name ${escapeShellArg cfg.build.user.name} \
-                --argstr system-name ${escapeShellArg cfg.build.host.name}
-
-              exec "$profile"/bin/switch-to-configuration switch
-              EOF
-
-            '';
-          };
-          infest = mkOption {
-            type = types.str;
-            default = ''
-              #! /bin/sh
-              set -efux
-
-              target=${escapeShellArg cfg.build.target}
-
-              push(){(
-                src=$1/
-                dst=$target:/mnt$2
-                rsync \
-                  --exclude .git \
-                  --exclude .graveyard \
-                  --exclude old \
-                  --rsync-path="mkdir -p \"/mnt$2\" && rsync" \
-                  --delete-excluded \
-                  -vrLptgoD \
-                  "$src" "$dst"
-              )}
-
-              cat krebs/4lib/infest/1prepare | ssh "$target"
-              cat krebs/4lib/infest/2install-nix | ssh "$target"
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev == null) ''
-                  push ${toString (map escapeShellArg [
-                    "${url}"
-                    "/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              ssh -S none "$target" /bin/sh <<\EOF
-              set -efux
-
-              fetch(){(
-                url=$1
-                rev=$2
-                dst=$3
-                mkdir -p "$dst"
-                cd "$dst"
-                if ! test -e .git; then
-                  git init
-                fi
-                if ! cur_url=$(git config remote.origin.url 2>/dev/null); then
-                  git remote add origin "$url"
-                elif test "$cur_url" != "$url"; then
-                  git remote set-url origin "$url"
-                fi
-                if test "$(git rev-parse --verify HEAD 2>/dev/null)" != "$rev"; then
-                  git fetch origin
-                  git checkout "$rev" -- .
-                  git checkout -q "$rev"
-                  git submodule init
-                  git submodule update
-                fi
-                git clean -dxf
-              )}
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev != null) ''
-                  fetch ${toString (map escapeShellArg [
-                    url
-                    rev
-                    "/mnt/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              export PATH=/root/.nix-profile/bin:/root/.nix-profile/sbin:$PATH
-
-              sed < "$(type -p nixos-install)" > nixos-install '
-                /^echo "building the system configuration..."/,/--set -A system/{
-                  s/.*/# &/
-                  s@.*--set -A system.*@&\n${concatStringsSep " " [
-                    "NIX_PATH=/mnt/root/src/"
-                    "nix-env"
-                    "-Q"
-                    "-p /nix/var/nix/profiles/system"
-                    "-f \"<stockholm>\""
-                    "--set"
-                    "-A system"
-                    "--argstr user-name ${escapeShellArg cfg.build.user.name}"
-                    "--argstr system-name ${escapeShellArg cfg.build.host.name}"
-                  ]}@
-                }
-              '
-
-              sed -i 's/^nixpkgs=.*$/#&/' nixos-install
-
-
-              chmod +x nixos-install
-
-              echo {} > /root/dummy.nix
-
-              echo build system...
-              profile=/nix/var/nix/profiles/system
-              NIXOS_CONFIG=/root/dummy.nix \
-              ./nixos-install -I /root/src/
-              #nl -bp nixos-install
-
-              EOF
-
-              cat krebs/4lib/infest/4finalize | ssh "$target"
-            '';
-          };
-          host = mkOption {
-            type = types.host;
-          };
-          user = mkOption {
-            type = types.user;
-          };
-        };
-      });
-      # Define defaul value, so unset values of the submodule get reported.
-      default = {};
-    };
-
     dns = {
       providers = mkOption {
         # TODO with types; tree dns.label dns.provider, so we can merge.
@@ -706,12 +488,13 @@ let
           };
         };
       };
-      mkdir = {
+      mkdir = rec {
         cores = 1;
         dc = "tv"; #dc = "cac";
+        infest.addr = head nets.internet.addrs4;
         nets = rec {
           internet = {
-            addrs4 = ["162.248.167.241"];
+            addrs4 = ["104.233.84.102"];
             aliases = [
               "mkdir.internet"
             ];
@@ -762,12 +545,13 @@ let
         };
         secure = true;
       };
-      rmdir = {
+      rmdir = rec {
         cores = 1;
         dc = "tv"; #dc = "cac";
+        infest.addr = head nets.internet.addrs4;
         nets = rec {
           internet = {
-            addrs4 = ["167.88.44.94"];
+            addrs4 = ["104.233.84.70"];
             aliases = [
               "rmdir.internet"
             ];
diff --git a/krebs/3modules/github-hosts-sync.nix b/krebs/3modules/github-hosts-sync.nix
index dbc0cc1de..f44fe3ad8 100644
--- a/krebs/3modules/github-hosts-sync.nix
+++ b/krebs/3modules/github-hosts-sync.nix
@@ -22,7 +22,7 @@ let
     };
     ssh-identity-file = mkOption {
       type = types.str; # TODO must be named *.ssh.{id_rsa,id_ed25519}
-      default = "/root/src/secrets/github-hosts-sync.ssh.id_rsa";
+      default = toString <secrets/github-hosts-sync.ssh.id_rsa>;
     };
   };
 
diff --git a/krebs/3modules/retiolum.nix b/krebs/3modules/retiolum.nix
index 2617644d9..633642537 100644
--- a/krebs/3modules/retiolum.nix
+++ b/krebs/3modules/retiolum.nix
@@ -75,7 +75,7 @@ let
       # TODO if it's types.path then it gets copied to /nix/store with
       #      bad unsafe permissions...
       type = types.str;
-      default = "/root/src/secrets/retiolum.rsa_key.priv";
+      default = toString <secrets/retiolum.rsa_key.priv>;
       description = ''
           Generate file with <literal>tincd -K</literal>.
           This file must exist on the local system. The default points to 
diff --git a/krebs/4lib/infest/3install-nix-tools b/krebs/4lib/infest/3install-nix-tools
deleted file mode 100644
index 59fa6f14a..000000000
--- a/krebs/4lib/infest/3install-nix-tools
+++ /dev/null
@@ -1,9 +0,0 @@
-#! /bin/sh
-set -efu
-
-install-nix-tools() {(
-
-
-)}
-
-install-nix-tools "$@"
diff --git a/krebs/4lib/types.nix b/krebs/4lib/types.nix
index f6b4bd8b1..dbffdf850 100644
--- a/krebs/4lib/types.nix
+++ b/krebs/4lib/types.nix
@@ -27,6 +27,16 @@ types // rec {
         type = with types; attrsOf string;
       };
 
+      infest = {
+        addr = mkOption {
+          type = str;
+        };
+        port = mkOption {
+          type = int;
+          default = 22;
+        };
+      };
+
       secure = mkOption {
         type = bool;
         default = false;
diff --git a/tv/1systems/cd.nix b/tv/1systems/cd.nix
index b385848f1..54a37b796 100644
--- a/tv/1systems/cd.nix
+++ b/tv/1systems/cd.nix
@@ -8,16 +8,18 @@ with lib;
 
   krebs.build.target = "root@cd.internet";
 
-  krebs.build.deps = {
-    nixpkgs = {
+  krebs.build.source = {
+    git.nixpkgs = {
       url = https://github.com/4z3/nixpkgs;
       rev = "03130ec91356cd250b80f144022ee2f4d665ca36"; # 1357692
     };
-    secrets = {
-      url = "/home/tv/secrets/${config.krebs.build.host.name}";
+    dir.secrets = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/secrets/cd";
     };
-    stockholm = {
-      url = toString ../..;
+    dir.stockholm = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/stockholm";
     };
   };
 
diff --git a/tv/1systems/mkdir.nix b/tv/1systems/mkdir.nix
index cd3d3b5c4..76432ba03 100644
--- a/tv/1systems/mkdir.nix
+++ b/tv/1systems/mkdir.nix
@@ -2,22 +2,37 @@
 
 with lib;
 
+let
+  # TODO merge with lass
+  getDefaultGateway = ip:
+    concatStringsSep "." (take 3 (splitString "." ip) ++ ["1"]);
+
+
+  primary-addr4 =
+    builtins.elemAt config.krebs.build.host.nets.internet.addrs4 0;
+
+  #secondary-addr4 =
+  #  builtins.elemAt config.krebs.build.host.nets.internet.addrs4 1;
+in
+
 {
   krebs.build.host = config.krebs.hosts.mkdir;
   krebs.build.user = config.krebs.users.tv;
 
-  krebs.build.target = "root@mkdir.internet";
+  krebs.build.target = "root@${primary-addr4}";
 
-  krebs.build.deps = {
-    nixpkgs = {
+  krebs.build.source = {
+    git.nixpkgs = {
       url = https://github.com/NixOS/nixpkgs;
-      rev = "9d5508d85c33b8fb22d79dde6176792eac2c2696";
+      rev = "68bd8e4a9dc247726ae89cc8739574261718e328";
     };
-    secrets = {
-      url = "/home/tv/secrets/${config.krebs.build.host.name}";
+    dir.secrets = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/secrets/mkdir";
     };
-    stockholm = {
-      url = toString ../..;
+    dir.stockholm = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/stockholm";
     };
   };
 
@@ -56,11 +71,18 @@ with lib;
 
   networking.interfaces.enp2s1.ip4 = [
     {
-      address = "162.248.167.241"; # TODO
+      address = primary-addr4;
       prefixLength = 24;
     }
+    #{
+    #  address = secondary-addr4;
+    #  prefixLength = 24;
+    #}
   ];
-  networking.defaultGateway = "162.248.167.1";
+
+  # TODO define gateway in krebs/3modules/default.nix
+  networking.defaultGateway = getDefaultGateway primary-addr4;
+
   networking.nameservers = [
     "8.8.8.8"
   ];
diff --git a/tv/1systems/nomic.nix b/tv/1systems/nomic.nix
index f08e74bbe..d5224b54a 100644
--- a/tv/1systems/nomic.nix
+++ b/tv/1systems/nomic.nix
@@ -8,16 +8,18 @@ with lib;
 
   krebs.build.target = "root@nomic.gg23";
 
-  krebs.build.deps = {
-    nixpkgs = {
+  krebs.build.source = {
+    git.nixpkgs = {
       url = https://github.com/4z3/nixpkgs;
       rev = "03130ec91356cd250b80f144022ee2f4d665ca36"; # 1357692
     };
-    secrets = {
-      url = "/home/tv/secrets/${config.krebs.build.host.name}";
+    dir.secrets = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/secrets/nomic";
     };
-    stockholm = {
-      url = toString ../..;
+    dir.stockholm = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/stockholm";
     };
   };
 
diff --git a/tv/1systems/rmdir.nix b/tv/1systems/rmdir.nix
index c8ac43e4c..79e47c539 100644
--- a/tv/1systems/rmdir.nix
+++ b/tv/1systems/rmdir.nix
@@ -2,22 +2,37 @@
 
 with lib;
 
+let
+  # TODO merge with lass
+  getDefaultGateway = ip:
+    concatStringsSep "." (take 3 (splitString "." ip) ++ ["1"]);
+
+
+  primary-addr4 =
+    builtins.elemAt config.krebs.build.host.nets.internet.addrs4 0;
+
+  #secondary-addr4 =
+  #  builtins.elemAt config.krebs.build.host.nets.internet.addrs4 1;
+in
+
 {
   krebs.build.host = config.krebs.hosts.rmdir;
   krebs.build.user = config.krebs.users.tv;
 
   krebs.build.target = "root@rmdir.internet";
 
-  krebs.build.deps = {
-    nixpkgs = {
+  krebs.build.source = {
+    git.nixpkgs = {
       url = https://github.com/NixOS/nixpkgs;
-      rev = "4c01e6d91993b6de128795f4fbdd25f6227fb870";
+      rev = "68bd8e4a9dc247726ae89cc8739574261718e328";
     };
-    secrets = {
-      url = "/home/tv/secrets/${config.krebs.build.host.name}";
+    dir.secrets = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/secrets/rmdir";
     };
-    stockholm = {
-      url = toString ../..;
+    dir.stockholm = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/stockholm";
     };
   };
 
@@ -57,11 +72,13 @@ with lib;
 
   networking.interfaces.enp2s1.ip4 = [
     {
-      address = "167.88.44.94";
+      address = primary-addr4;
       prefixLength = 24;
     }
   ];
-  networking.defaultGateway = "167.88.44.1";
+  # TODO define gateway in krebs/3modules/default.nix
+  networking.defaultGateway = getDefaultGateway primary-addr4;
+
   networking.nameservers = [
     "8.8.8.8"
   ];
diff --git a/tv/1systems/wu.nix b/tv/1systems/wu.nix
index 36733ac41..629c4a5c8 100644
--- a/tv/1systems/wu.nix
+++ b/tv/1systems/wu.nix
@@ -8,16 +8,18 @@ with lib;
 
   krebs.build.target = "root@wu";
 
-  krebs.build.deps = {
-    nixpkgs = {
-      url = https://github.com/4z3/nixpkgs;
-      rev = "03130ec91356cd250b80f144022ee2f4d665ca36"; # 1357692
+  krebs.build.source = {
+    git.nixpkgs = {
+      url = https://github.com/NixOS/nixpkgs;
+      rev = "bd84ebaa1e0359f41350e053ed24592b169b5714";
     };
-    secrets = {
-      url = "/home/tv/secrets/${config.krebs.build.host.name}";
+    dir.secrets = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/secrets/wu";
     };
-    stockholm = {
-      url = toString ../..;
+    dir.stockholm = {
+      host = config.krebs.hosts.wu;
+      path = "/home/tv/stockholm";
     };
   };
 
diff --git a/tv/2configs/base.nix b/tv/2configs/base.nix
index 89a66115a..1c6eba662 100644
--- a/tv/2configs/base.nix
+++ b/tv/2configs/base.nix
@@ -15,9 +15,10 @@ in
 
   imports = [
     {
+      # TODO never put hashedPassword into the store
       users.extraUsers =
         mapAttrs (_: h: { hashedPassword = h; })
-                 (import /root/src/secrets/hashedPasswords.nix);
+                 (import <secrets/hashedPasswords.nix>);
     }
     {
       users.defaultUserShell = "/run/current-system/sw/bin/bash";
diff --git a/tv/2configs/charybdis.nix b/tv/2configs/charybdis.nix
index a949026de..80c6f7c4a 100644
--- a/tv/2configs/charybdis.nix
+++ b/tv/2configs/charybdis.nix
@@ -21,7 +21,7 @@ let
     };
     dhParams = mkOption {
       type = types.str;
-      default = "/root/src/secrets/charybdis.dh.pem";
+      default = toString <secrets/charybdis.dh.pem>;
     };
     motd = mkOption {
       type = types.str;
@@ -32,7 +32,7 @@ let
     };
     sslKey = mkOption {
       type = types.str;
-      default = "/root/src/secrets/charybdis.key.pem";
+      default = toString <secrets/charybdis.key.pem>;
     };
   };
 
diff --git a/tv/2configs/git.nix b/tv/2configs/git.nix
index 6624d62dc..5f5fae483 100644
--- a/tv/2configs/git.nix
+++ b/tv/2configs/git.nix
@@ -51,7 +51,8 @@ let
         collaborators = with config.krebs.users; [ lass makefu ];
       };
     } //
-    import /root/src/secrets/repos.nix { inherit config lib pkgs; }
+    # TODO don't put secrets/repos.nix into the store
+    import <secrets/repos.nix> { inherit config lib pkgs; }
   );
 
   make-public-repo = name: { desc ? null, ... }: {
diff --git a/tv/3modules/consul.nix b/tv/3modules/consul.nix
index 82a15c024..e764ab7b2 100644
--- a/tv/3modules/consul.nix
+++ b/tv/3modules/consul.nix
@@ -29,7 +29,7 @@ let
     };
     encrypt-file = mkOption {
       type = types.str; # TODO path (but not just into store)
-      default = "/root/src/secrets/consul-encrypt.json";
+      default = toString <secrets/consul-encrypt.json>;
     };
     data-dir = mkOption {
       type = types.str; # TODO path (but not just into store)
diff --git a/tv/3modules/ejabberd.nix b/tv/3modules/ejabberd.nix
index 2910a9a69..6b231fb56 100644
--- a/tv/3modules/ejabberd.nix
+++ b/tv/3modules/ejabberd.nix
@@ -15,7 +15,7 @@ let
 
     certFile = mkOption {
       type = types.str;
-      default = "/root/src/secrets/ejabberd.pem";
+      default = toString <secrets/ejabberd.pem>;
     };
 
     hosts = mkOption {