Merge branch 'master' of prism:stockholm

33 files changed, 74 insertions, 343 deletions

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..c96fec739
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "submodules/nix-writers"]
+	path = submodules/nix-writers
+	url = http://cgit.krebsco.de/nix-writers
diff --git a/jeschli/5pkgs/simple/xmonad-jeschli/default.nix b/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
index 578a51c8f..60dbbc50c 100644
--- a/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
+++ b/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
@@ -1,5 +1,5 @@
 { pkgs, ... }:
-pkgs.writeHaskell "xmonad-jeschli" {
+pkgs.writeHaskellPackage "xmonad-jeschli" {
   executables.xmonad = {
     extra-depends = [
       "containers"
diff --git a/jeschli/source.nix b/jeschli/source.nix
index 29cf9d818..fc1413ee4 100644
--- a/jeschli/source.nix
+++ b/jeschli/source.nix
@@ -7,6 +7,7 @@ host@{ name, secure ? false, override ? {} }: let
   pkgs = import <nixpkgs> {
     overlays = map import [
       <stockholm/krebs/5pkgs>
+      <stockholm/submodules/nix-writers/pkgs>
     ];
   };
 in
diff --git a/krebs/2configs/buildbot-stockholm.nix b/krebs/2configs/buildbot-stockholm.nix
index 04b1c999f..62a5f9ab5 100644
--- a/krebs/2configs/buildbot-stockholm.nix
+++ b/krebs/2configs/buildbot-stockholm.nix
@@ -63,6 +63,7 @@ in
       grab_repo = steps.Git(
           repourl=stockholm_repo,
           mode='full',
+          submodules=True,
       )
     '';
     builder = {
diff --git a/krebs/3modules/git.nix b/krebs/3modules/git.nix
index ba0924681..5ae24b40b 100644
--- a/krebs/3modules/git.nix
+++ b/krebs/3modules/git.nix
@@ -484,7 +484,7 @@ let
 
   reponames = rules: sort lessThan (unique (map (x: x.repo.name) rules));
 
-  # TODO use `writeOut`
+  # TODO use pkgs.write (from nix-writers)
   scriptFarm =
     farm-name: scripts:
     let
diff --git a/krebs/3modules/lass/default.nix b/krebs/3modules/lass/default.nix
index fd74983fa..e2322e171 100644
--- a/krebs/3modules/lass/default.nix
+++ b/krebs/3modules/lass/default.nix
@@ -66,6 +66,7 @@ with import <stockholm/lib>;
           ions                60 IN A      ${config.krebs.hosts.prism.nets.internet.ip4.addr}
           paste               60 IN A      ${config.krebs.hosts.prism.nets.internet.ip4.addr}
           lol                 60 IN A      ${config.krebs.hosts.prism.nets.internet.ip4.addr}
+          radio               60 IN A      ${config.krebs.hosts.prism.nets.internet.ip4.addr}
         '';
       };
       nets = rec {
diff --git a/krebs/5pkgs/simple/Reaktor/plugins.nix b/krebs/5pkgs/simple/Reaktor/plugins.nix
index c39e39799..2df76fb2f 100644
--- a/krebs/5pkgs/simple/Reaktor/plugins.nix
+++ b/krebs/5pkgs/simple/Reaktor/plugins.nix
@@ -120,7 +120,7 @@ rec {
   url-title = (buildSimpleReaktorPlugin "url-title" {
     pattern = "^.*(?P<args>http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+).*$$";
     path = with pkgs; [ curl perl ];
-    script = pkgs.writePython3 [ "beautifulsoup4" "lxml" ] "url-title" ''
+    script = pkgs.writePython3 "url-title" [ "beautifulsoup4" "lxml" ] ''
       import sys
       import urllib.request
       from bs4 import BeautifulSoup
diff --git a/krebs/5pkgs/simple/brain/default.nix b/krebs/5pkgs/simple/brain/default.nix
index e69b44f0f..9b125862b 100644
--- a/krebs/5pkgs/simple/brain/default.nix
+++ b/krebs/5pkgs/simple/brain/default.nix
@@ -1,6 +1,6 @@
-{ pass, writeOut, writeDash, ... }:
+{ pass, write, writeDash, ... }:
 
-writeOut "brain" {
+write "brain" {
   "/bin/brain".link = writeDash "brain" ''
     PASSWORD_STORE_DIR=$HOME/brain \
     exec ${pass}/bin/pass $@
diff --git a/krebs/5pkgs/simple/stockholm/default.nix b/krebs/5pkgs/simple/stockholm/default.nix
index 9afe79510..c973386d6 100644
--- a/krebs/5pkgs/simple/stockholm/default.nix
+++ b/krebs/5pkgs/simple/stockholm/default.nix
@@ -225,6 +225,6 @@
 
 in
 
-  pkgs.writeOut "stockholm" (lib.mapAttrs' (name: link:
+  pkgs.write "stockholm" (lib.mapAttrs' (name: link:
     lib.nameValuePair "/bin/${name}" { inherit link; }
   ) cmds)
diff --git a/krebs/5pkgs/writers.nix b/krebs/5pkgs/writers.nix
deleted file mode 100644
index 1939bf854..000000000
--- a/krebs/5pkgs/writers.nix
+++ /dev/null
@@ -1,318 +0,0 @@
-pkgs: oldpkgs:
-with import <stockholm/lib>;
-  {
-    execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
-    in pkgs.writeC name { inherit destination; } /* c */ ''
-      #include <unistd.h>
-
-      static char *const filename = ${toC filename};
-
-      ${if argv == null
-        then /* Propagate arguments */ /* c */ ''
-          #define MAIN_ARGS int argc, char **argv
-        ''
-        else /* Provide fixed arguments */ /* c */ ''
-          #define MAIN_ARGS void
-          static char *const argv[] = ${toC (argv ++ [null])};
-        ''}
-
-      static char *const envp[] = ${toC (
-        mapAttrsToList (k: v: "${k}=${v}") envp ++ [null]
-      )};
-
-      int main (MAIN_ARGS) {
-        execve(filename, argv, envp);
-        return -1;
-      }
-    '';
-
-    execveBin = name: cfg:
-      pkgs.execve name (cfg // { destination = "/bin/${name}"; });
-
-    makeScriptWriter = { interpreter, check ? null }: name: text:
-      assert (with types; either absolute-pathname filename).check name;
-      pkgs.writeOut (baseNameOf name) {
-        ${optionalString (types.absolute-pathname.check name) name} = {
-          inherit check;
-          executable = true;
-          text = "#! ${interpreter}\n${text}";
-        };
-      };
-
-    writeBash = name: text:
-      assert (with types; either absolute-pathname filename).check name;
-      pkgs.writeOut (baseNameOf name) {
-        ${optionalString (types.absolute-pathname.check name) name} = {
-          executable = true;
-          text = "#! ${pkgs.bash}/bin/bash\n${text}";
-        };
-      };
-
-    writeBashBin = name:
-      assert types.filename.check name;
-      pkgs.writeBash "/bin/${name}";
-
-    writeC = name: { destination ? "" }: text: pkgs.runCommand name {
-      inherit text;
-      passAsFile = [ "text" ];
-    } /* sh */ ''
-      PATH=${makeBinPath (with pkgs; [
-        # TODO remove if everyone migrated to 18.03
-        (if hasAttr "binutils-unwrapped" pkgs then binutils-unwrapped else binutils)
-        coreutils
-        gcc
-      ])}
-      exe=$out${destination}
-      mkdir -p "$(dirname "$exe")"
-      gcc -O -Wall -o "$exe" -x c "$textPath"
-      strip --strip-unneeded "$exe"
-    '';
-
-    writeDash = pkgs.makeScriptWriter {
-      interpreter = "${pkgs.dash}/bin/dash";
-    };
-
-    writeDashBin = name:
-      assert types.filename.check name;
-      pkgs.writeDash "/bin/${name}";
-
-    writeEximConfig = name: text: pkgs.runCommand name {
-      inherit text;
-      passAsFile = [ "text" ];
-    } /* sh */ ''
-      # TODO validate exim config even with config.nix.useChroot == true
-      # currently doing so will fail because "user exim was not found"
-      #${pkgs.exim}/bin/exim -C "$textPath" -bV >/dev/null
-      mv "$textPath" $out
-    '';
-
-    writeOut = name: specs0:
-    let
-      writers.link =
-        { path
-        , link
-        }:
-        assert path == "" || types.absolute-pathname.check path;
-        assert types.package.check link;
-        {
-          install = /* sh */ ''
-            ${optionalString (path != "") /* sh */ ''
-              ${pkgs.coreutils}/bin/mkdir -p $out${dirOf path}
-            ''}
-            ${pkgs.coreutils}/bin/ln -s ${link} $out${path}
-          '';
-        };
-
-      writers.text =
-        { path
-        , check ? null
-        , executable ? false
-        , mode ? if executable then "0755" else "0644"
-        , text
-        }:
-        assert path == "" || types.absolute-pathname.check path;
-        assert types.bool.check executable;
-        assert types.file-mode.check mode;
-        rec {
-          var = "file_${hashString "sha1" path}";
-          val = text;
-          install = /* sh */ ''
-            ${optionalString (check != null) /* sh */ ''
-              ${check} ''$${var}Path
-            ''}
-            ${pkgs.coreutils}/bin/install \
-                -m ${mode} \
-                -D \
-                ''$${var}Path $out${path}
-          '';
-        };
-
-      write = spec: writers.${spec.type} (removeAttrs spec ["type"]);
-
-      specs =
-        mapAttrsToList
-          (path: spec: let
-            known-types = [ "link" "text" ];
-            found-types = attrNames (getAttrs known-types spec);
-            type = assert length found-types == 1; head found-types;
-          in spec // { inherit path type; })
-          specs0;
-
-      files = map write specs;
-
-      filevars = genAttrs' (filter (hasAttr "var") files)
-                           (spec: nameValuePair spec.var spec.val);
-
-      env = filevars // { passAsFile = attrNames filevars; };
-    in
-      # Use a subshell because <nixpkgs/stdenv/generic/setup.sh>'s genericBuild
-      # sources (or evaluates) the buildCommand and we don't want to modify its
-      # shell.  In particular, exitHandler breaks in multiple ways with set -u.
-      pkgs.runCommand name env /* sh */ ''
-        (
-          set -efu
-          ${concatMapStringsSep "\n" (getAttr "install") files}
-        )
-      '';
-
-    writeHaskell =
-      k:
-      let
-        k' = parseDrvName k;
-        name = k'.name;
-        version = if k'.version != "" then k'.version else "0";
-      in
-      { base-depends ? ["base"]
-      , executables ? {}
-      , ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"]
-      , haskellPackages ? pkgs.haskellPackages
-      , library ? null
-      , license ? "WTFPL"
-      }:
-      let
-        isExecutable = executables != {};
-        isLibrary = library != null;
-
-        cabal-file = pkgs.writeText "${name}-${version}.cabal" /* cabal */ ''
-          build-type: Simple
-          cabal-version: >= 1.2
-          name: ${name}
-          version: ${version}
-          ${concatStringsSep "\n" (mapAttrsToList exe-section executables)}
-          ${optionalString isLibrary (lib-section library)}
-        '';
-
-        exe-install =
-          exe-name:
-          { file ? pkgs.writeText "${name}-${exe-name}.hs" text
-          , relpath ? "${exe-name}.hs"
-          , text
-          , ... }:
-          if types.filename.check exe-name
-            then /* sh */ "install -D ${file} $out/${relpath}"
-            else throw "argument ‘exe-name’ is not a ${types.filename.name}";
-
-        exe-section =
-          exe-name:
-          { build-depends ? base-depends ++ extra-depends
-          , extra-depends ? []
-          , file ? pkgs.writeText "${name}-${exe-name}.hs" text
-          , relpath ? "${exe-name}.hs"
-          , text
-          , ... }: /* cabal */ ''
-            executable ${exe-name}
-              build-depends: ${concatStringsSep "," build-depends}
-              ghc-options: ${toString ghc-options}
-              main-is: ${relpath}
-          '';
-
-        get-depends =
-          { build-depends ? base-depends ++ extra-depends
-          , extra-depends ? []
-          , ...
-          }:
-          build-depends;
-
-        lib-install =
-          { exposed-modules
-          , ... }:
-          concatStringsSep "\n" (mapAttrsToList mod-install exposed-modules);
-
-        lib-section =
-          { build-depends ? base-depends ++ extra-depends
-          , extra-depends ? []
-          , exposed-modules
-          , ... }: /* cabal */ ''
-            library
-              build-depends: ${concatStringsSep "," build-depends}
-              ghc-options: ${toString ghc-options}
-              exposed-modules: ${concatStringsSep "," (attrNames exposed-modules)}
-          '';
-
-        mod-install =
-          mod-name:
-          { file ? pkgs.writeText "${name}-${mod-name}.hs" text
-          , relpath ? "${replaceStrings ["."] ["/"] mod-name}.hs"
-          , text
-          , ... }:
-          if types.haskell.modid.check mod-name
-            then /* sh */ "install -D ${file} $out/${relpath}"
-            else throw "argument ‘mod-name’ is not a ${types.haskell.modid.name}";
-      in
-        haskellPackages.mkDerivation {
-          inherit isExecutable isLibrary license version;
-          executableHaskellDepends =
-            attrVals
-              (concatMap get-depends (attrValues executables))
-              haskellPackages;
-          libraryHaskellDepends =
-            attrVals
-              (optionals isLibrary (get-depends library))
-              haskellPackages;
-          pname = name;
-          src = pkgs.runCommand "${name}-${version}-src" {} /* sh */ ''
-            install -D ${cabal-file} $out/${cabal-file.name}
-            ${optionalString isLibrary (lib-install library)}
-            ${concatStringsSep "\n" (mapAttrsToList exe-install executables)}
-          '';
-        };
-
-    writeJq = name: text:
-      assert (with types; either absolute-pathname filename).check name;
-      pkgs.writeOut (baseNameOf name) {
-        ${optionalString (types.absolute-pathname.check name) name} = {
-          check = pkgs.writeDash "jqcheck.sh" ''
-            exec ${pkgs.jq}/bin/jq -f "$1" < /dev/null
-          '';
-          inherit text;
-        };
-      };
-
-    writeJSON = name: value: pkgs.runCommand name {
-      json = toJSON value;
-      passAsFile = [ "json" ];
-    } /* sh */ ''
-      ${pkgs.jq}/bin/jq . "$jsonPath" > "$out"
-    '';
-
-    writeNixFromCabal =
-      trace (toString [
-        "The function `writeNixFromCabal` has been deprecated in favour of"
-        "`writeHaskell`."
-      ])
-      (name: path: pkgs.runCommand name {} /* sh */ ''
-        ${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out
-      '');
-
-    writePython2 = deps:
-    let
-      py = pkgs.python2.withPackages(ps: attrVals deps ps);
-    in
-    pkgs.makeScriptWriter {
-      interpreter = "${py}/bin/python";
-      check = pkgs.writeDash "python2check.sh" ''
-        exec ${pkgs.python2Packages.flake8}/bin/flake8 --show-source "$1"
-      '';
-    };
-
-    writePython2Bin = d: name:
-      pkgs.writePython2 d "/bin/${name}";
-
-    writePython3 = deps:
-    let
-      py = pkgs.python3.withPackages(ps: attrVals deps ps);
-    in
-    pkgs.makeScriptWriter {
-      interpreter = "${py}/bin/python";
-      check = pkgs.writeDash "python3check.sh" ''
-        exec ${pkgs.python3Packages.flake8}/bin/flake8 --show-source "$1"
-      '';
-    };
-
-    writePython3Bin = d: name:
-      pkgs.writePython3 d "/bin/${name}";
-
-    writeSed = pkgs.makeScriptWriter {
-      interpreter = "${pkgs.gnused}/bin/sed -f";
-    };
-  }
diff --git a/krebs/default.nix b/krebs/default.nix
index 55bf66f77..d99f60aaa 100644
--- a/krebs/default.nix
+++ b/krebs/default.nix
@@ -3,6 +3,10 @@ with import <stockholm/lib>;
 {
   imports = [
     ./3modules
+    {
+      nixpkgs.config.packageOverrides =
+        import ../submodules/nix-writers/pkgs pkgs;
+    }
   ];
   nixpkgs.config.packageOverrides = import ./5pkgs pkgs;
 }
diff --git a/krebs/source.nix b/krebs/source.nix
index 2aaa27b2b..5b86e89c6 100644
--- a/krebs/source.nix
+++ b/krebs/source.nix
@@ -7,6 +7,7 @@ host@{ name, secure ? false, override ? {} }: let
   pkgs = import <nixpkgs> {
     overlays = map import [
       <stockholm/krebs/5pkgs>
+      <stockholm/submodules/nix-writers/pkgs>
     ];
   };
 in
diff --git a/lass/1systems/cabal/config.nix b/lass/1systems/cabal/config.nix
index 64c179e67..6a8040c9d 100644
--- a/lass/1systems/cabal/config.nix
+++ b/lass/1systems/cabal/config.nix
@@ -8,11 +8,6 @@
     <stockholm/lass/2configs/retiolum.nix>
     <stockholm/lass/2configs/exim-retiolum.nix>
     <stockholm/lass/2configs/baseX.nix>
-    <stockholm/lass/2configs/browsers.nix>
-    <stockholm/lass/2configs/programs.nix>
-    <stockholm/lass/2configs/fetchWallpaper.nix>
-    <stockholm/lass/2configs/games.nix>
-    <stockholm/lass/2configs/bitcoin.nix>
     <stockholm/lass/2configs/AP.nix>
     <stockholm/lass/2configs/blue-host.nix>
   ];
diff --git a/lass/1systems/prism/config.nix b/lass/1systems/prism/config.nix
index 9a0bb49e9..780403813 100644
--- a/lass/1systems/prism/config.nix
+++ b/lass/1systems/prism/config.nix
@@ -281,6 +281,18 @@ with import <stockholm/lib>;
       ];
     }
     {
+      services.nginx = {
+        enable = true;
+        virtualHosts."radio.lassul.us" = {
+          forceSSL = true;
+          enableACME = true;
+          locations."/".extraConfig = ''
+            proxy_pass http://localhost:8000;
+          '';
+        };
+      };
+    }
+    {
       lass.nichtparasoup.enable = true;
       services.nginx = {
         enable = true;
@@ -341,6 +353,14 @@ with import <stockholm/lib>;
         { predicate = "-p udp --dport 60000:61000"; target = "ACCEPT";}
       ];
     }
+    {
+      services.murmur.enable = true;
+      services.murmur.registerName = "lassul.us";
+      krebs.iptables.tables.filter.INPUT.rules = [
+        { predicate = "-p tcp --dport 64738"; target = "ACCEPT";}
+      ];
+
+    }
   ];
 
   krebs.build.host = config.krebs.hosts.prism;
diff --git a/lass/2configs/baseX.nix b/lass/2configs/baseX.nix
index afdefaa45..b27368613 100644
--- a/lass/2configs/baseX.nix
+++ b/lass/2configs/baseX.nix
@@ -81,6 +81,7 @@ in {
     mpv-poll
     much
     ncdu
+    nix-index
     nix-repl
     nmap
     pavucontrol
diff --git a/lass/2configs/blue-host.nix b/lass/2configs/blue-host.nix
index 657234bc1..83c235f3e 100644
--- a/lass/2configs/blue-host.nix
+++ b/lass/2configs/blue-host.nix
@@ -5,6 +5,7 @@ with import <stockholm/lib>;
   imports = [
     <stockholm/lass/2configs/container-networking.nix>
   ];
+  systemd.services."container@blue".reloadIfChanged = mkForce false;
   containers.blue = {
     config = { ... }: {
       environment.systemPackages = [ pkgs.git ];
diff --git a/lass/2configs/mc.nix b/lass/2configs/mc.nix
index 3bd1852a8..eb457b7d3 100644
--- a/lass/2configs/mc.nix
+++ b/lass/2configs/mc.nix
@@ -326,7 +326,7 @@ in {
       name = "mc";
       paths = [
         (pkgs.writeDashBin "mc" ''
-          export MC_DATADIR=${pkgs.writeOut "mc-ext" {
+          export MC_DATADIR=${pkgs.write "mc-ext" {
               "/mc.ext".link = mcExt;
               "/sfs.ini".text = "";
           }};
diff --git a/lass/2configs/reaktor-coders.nix b/lass/2configs/reaktor-coders.nix
index 5a39f7115..0ce147acd 100644
--- a/lass/2configs/reaktor-coders.nix
+++ b/lass/2configs/reaktor-coders.nix
@@ -65,7 +65,7 @@ with import <stockholm/lib>;
       })
       (buildSimpleReaktorPlugin "random-unicorn-porn" {
         pattern = "^!rup$$";
-        script = pkgs.writePython2 [] "rup" ''
+        script = pkgs.writePython2 "rup" [] ''
           t1 = """
                               _.
                            ;=',_ ()
diff --git a/lass/3modules/usershadow.nix b/lass/3modules/usershadow.nix
index fc9e63e31..cb2890969 100644
--- a/lass/3modules/usershadow.nix
+++ b/lass/3modules/usershadow.nix
@@ -45,7 +45,7 @@
       "pwstore-fast"
       "bytestring"
     ];
-    body = pkgs.writeHaskell "passwords" {
+    body = pkgs.writeHaskellPackage "passwords" {
       executables.verify_pam = {
         extra-depends = deps;
         text = ''
diff --git a/lass/3modules/xjail.nix b/lass/3modules/xjail.nix
index 325ebcc99..4c0023a76 100644
--- a/lass/3modules/xjail.nix
+++ b/lass/3modules/xjail.nix
@@ -44,7 +44,7 @@ with import <stockholm/lib>;
         wm = mkOption {
           #TODO find type
           type = types.string;
-          default = "${pkgs.writeHaskell "xephyrify-xmonad" {
+          default = "${pkgs.writeHaskellPackage "xephyrify-xmonad" {
             executables.xmonad = {
               extra-depends = [
                 "containers"
diff --git a/lass/5pkgs/custom/xmonad-lass/default.nix b/lass/5pkgs/custom/xmonad-lass/default.nix
index 868c1072a..7180f2a69 100644
--- a/lass/5pkgs/custom/xmonad-lass/default.nix
+++ b/lass/5pkgs/custom/xmonad-lass/default.nix
@@ -1,5 +1,5 @@
 { config, pkgs, ... }:
-pkgs.writeHaskell "xmonad-lass" {
+pkgs.writeHaskellPackage "xmonad-lass" {
   executables.xmonad = {
     extra-depends = [
       "containers"
diff --git a/lass/5pkgs/dpass/default.nix b/lass/5pkgs/dpass/default.nix
index 7e75d50c7..c1e803bcb 100644
--- a/lass/5pkgs/dpass/default.nix
+++ b/lass/5pkgs/dpass/default.nix
@@ -1,6 +1,6 @@
-{ pass, writeOut, writeDash, ... }:
+{ pass, write, writeDash, ... }:
 
-writeOut "dsco-pass" {
+write "dsco-pass" {
   "/bin/dpass".link = writeDash "dpass" ''
     PASSWORD_STORE_DIR=$HOME/.dpasswordstore \
     exec ${pass}/bin/pass $@
diff --git a/lass/5pkgs/xephyrify/default.nix b/lass/5pkgs/xephyrify/default.nix
index 8d6036843..20c546dbb 100644
--- a/lass/5pkgs/xephyrify/default.nix
+++ b/lass/5pkgs/xephyrify/default.nix
@@ -1,8 +1,8 @@
-{ writeDashBin, writeHaskell, coreutils, xorg, virtualgl, ... }:
+{ writeDashBin, writeHaskellPackage, coreutils, xorg, virtualgl, ... }:
 
 let
 
-  xephyrify-xmonad = writeHaskell "xephyrify-xmonad" {
+  xephyrify-xmonad = writeHaskellPackage "xephyrify-xmonad" {
     executables.xmonad = {
       extra-depends = [
         "containers"
diff --git a/lass/source.nix b/lass/source.nix
index e7991da2a..49f919faf 100644
--- a/lass/source.nix
+++ b/lass/source.nix
@@ -7,6 +7,7 @@ host@{ name, secure ? false, override ? {} }: let
   pkgs = import <nixpkgs> {
     overlays = map import [
       <stockholm/krebs/5pkgs>
+      <stockholm/submodules/nix-writers/pkgs>
     ];
   };
 in
diff --git a/makefu/source.nix b/makefu/source.nix
index 85953615e..c1e291b8a 100644
--- a/makefu/source.nix
+++ b/makefu/source.nix
@@ -20,6 +20,7 @@ let
   pkgs = import <nixpkgs> {
     overlays = map import [
       <stockholm/krebs/5pkgs>
+      <stockholm/submodules/nix-writers/pkgs>
     ];
   };
   # TODO: automate updating of this ref + cherry-picks
diff --git a/mv/source.nix b/mv/source.nix
index 1a7b83961..29dfe9723 100644
--- a/mv/source.nix
+++ b/mv/source.nix
@@ -7,6 +7,7 @@ host@{ name, override ? {} }: let
   pkgs = import <nixpkgs> {
     overlays = map import [
       <stockholm/krebs/5pkgs>
+      <stockholm/submodules/nix-writers/pkgs>
     ];
   };
 in
diff --git a/nin/1systems/axon/config.nix b/nin/1systems/axon/config.nix
index 483a4f84b..5e81afdbd 100644
--- a/nin/1systems/axon/config.nix
+++ b/nin/1systems/axon/config.nix
@@ -59,7 +59,11 @@ with lib;
 
   # nin config
   time.timeZone = "Europe/Berlin";
-  services.xserver.enable = true;
+  services.xserver = {
+    enable = true;
+
+    displayManager.lightdm.enable = true;
+  };
 
   networking.networkmanager.enable = true;
   #networking.wireless.enable = true;
@@ -76,12 +80,19 @@ with lib;
   #nixpkgs.config.steam.java = true;
 
   environment.