diff --git a/makefu/krops.nix b/makefu/krops.nix
index 3838db635..f8ea6f7ef 100644
--- a/makefu/krops.nix
+++ b/makefu/krops.nix
@@ -18,6 +18,7 @@
     unstable = false; #unstable channel checked out
     mic92 = false;
     nms = false;
+    arm6 = false;
     clever_kexec = false;
   } // import (./. + "/1systems/${name}/source.nix");
   source = { test }: lib.evalSource [
@@ -29,6 +30,9 @@
       nixpkgs = if test || host-src.full then {
         git.ref = nixpkgs-src.rev;
         git.url = nixpkgs-src.url;
+      } else if host-src.arm6 then {
+        # TODO: we want to track the unstable channel
+        symlink = "/nix/var/nix/profiles/per-user/root/channels/nixos/";
       } else {
         file = "/home/makefu/store/${nixpkgs-src.rev}";
       };
diff --git a/makefu/source.nix b/makefu/source.nix
deleted file mode 100644
index c350fe72c..000000000
--- a/makefu/source.nix
+++ /dev/null
@@ -1,122 +0,0 @@
-with import <stockholm/lib>;
-host@{ name,
-  override ? {}
-, secure ? false
-, full ? false
-, torrent ? false
-, hw ? false
-, musnix ? false
-, python ? false
-, unstable ? false #unstable channel checked out
-, mic92 ? false
-, nms ? false
-, clever_kexec ?false
-}:
-let
-  builder = if getEnv "dummy_secrets" == "true"
-              then "buildbot"
-              else "makefu";
-  _file = <stockholm> + "/makefu/1systems/${name}/source.nix";
-  pkgs = import <nixpkgs> {
-    overlays = map import [
-      <stockholm/krebs/5pkgs>
-      <stockholm/submodules/nix-writers/pkgs>
-    ];
-  };
-  # TODO: automate updating of this ref + cherry-picks
-  ref = "8f991294288"; # nixos-18.03 @ 2018-08-06
-                       # + do_sqlite3 ruby:   55a952be5b5
-                       # + exfat-nofuse bump: ee6a5296a35
-                       # + uhub/sqlite: 5dd7610401747
-
-in
-  evalSource (toString _file) [
-    {
-      nixos-config.symlink = "stockholm/makefu/1systems/${name}/config.nix";
-      # always perform a full populate when buildbot
-      nixpkgs = if full || (builder == "buildbot" ) then {
-          git = {
-            url = https://github.com/makefu/nixpkgs;
-            inherit ref;
-          };
-        } else {
-          # right now it is simply extracted revision folder
-
-          ## prepare so we do not have to wait for rsync:
-          ## cd /var/src; curl https://github.com/nixos/nixpkgs/tarball/125ffff  -L | tar zx  && mv NixOS-nixpkgs-125ffff nixpkgs
-          file = "/home/makefu/store/${ref}";
-        };
-
-      secrets = getAttr builder {
-        buildbot.file = toString <stockholm/makefu/0tests/data/secrets>;
-        makefu.pass = {
-          inherit name;
-          dir = "${getEnv "HOME"}/.secrets-pass";
-        };
-      };
-
-
-      stockholm.file = toString <stockholm>;
-      stockholm-version.pipe = "${pkgs.coreutils}/bin/echo derp";
-    }
-    (mkIf ( musnix ) {
-      musnix.git = {
-        url = https://github.com/musnix/musnix.git;
-        ref = "master"; # follow the musnix channel, lets see how this works out
-      };
-    })
-
-    (mkIf ( hw ) {
-      nixos-hardware.git = {
-        url = https://github.com/nixos/nixos-hardware.git;
-        ref = "30fdd53";
-      };
-    })
-
-    (mkIf ( python ) {
-      python.git = {
-        url = https://github.com/garbas/nixpkgs-python;
-        ref = "cac319b7";
-      };
-    })
-
-    (mkIf ( torrent ) {
-      torrent-secrets = getAttr builder {
-        buildbot.file = toString <stockholm/makefu/0tests/data/secrets>;
-        makefu.pass = {
-          name = "torrent";
-          dir = "${getEnv "HOME"}/.secrets-pass";
-        };
-      };
-    })
-
-    (mkIf ( unstable ) {
-      nixpkgs-unstable.git = {
-        url = https://github.com/nixos/nixpkgs-channels;
-        ref = "nixos-unstable";
-      };
-    })
-
-    (mkIf ( mic92 ) {
-      mic92.git = {
-        url = https://github.com/Mic92/dotfiles/;
-        ref = "48a1f49";
-      };
-    })
-
-    (mkIf ( nms ) {
-      nms.git = {
-        url = https://github.com/r-raymond/nixos-mailserver;
-        ref = "v2.1.2";
-      };
-    })
-
-    (mkIf ( clever_kexec ) {
-      clever_kexec.git = {
-        url = https://github.com/cleverca22/nix-tests;
-        ref = "5a670de7f2decfaafc95c34ffeb0f1896662f3d7";
-      };
-    })
-
-    override
-  ]