diff --git a/overlay/default.nix b/overlay/default.nix
index 49115ca..03b6ff3 100644
--- a/overlay/default.nix
+++ b/overlay/default.nix
@@ -165,23 +165,23 @@ in nullPkgs // {
     # Stay clear of upstream on this one.
     addPatchesHost [ ./ncurses/genode.patch ] prev.ncurses;
 
-  nim-unwrapped =
-    # programs are still linking to posix library
-    overrideAttrsTarget ({ patches, ... }: {
-      version = "1.6.8";
-      src = fetchurl {
-        url = "https://nim-lang.org/download/nim-1.6.8.tar.xz";
-        hash = "sha256-D1tlzbYPeK9BywdcI4mDaJoeH34lyBnxeYYsGKSEz1c=";
-      };
-      patches = patches ++ [ ./nim.patch ];
-    }) prev.nim-unwrapped;
+  nimNoLibs = nim.override { stdenv = stdenvNoLibs; };
 
   nimPackages =
     # Packages from the Nimble flake with adjustments.
-    prev.nimPackages.overrideScope' (_: prev': {
+    prev.nimPackages.overrideScope' (final': prev':
+      with final'; {
+        buildNimPackage = if hostPlatform.isGenode then
+          ({ nimFlags ? [ ], ... }@args:
+            prev'.buildNimPackage (args // {
+              nimBackend = "cpp";
+              nimDefines.posix = { };
+              doCheck = false;
+            }))
+        else
+          prev'.buildNimPackage;
 
-      dhall = with prev';
-        buildNimPackage rec {
+        dhall = buildNimPackage rec {
           pname = "dhall";
           version = "20221007";
           src = prev.fetchFromSourcehut {
@@ -193,16 +193,34 @@ in nullPkgs // {
           buildInputs = [ bigints cbor ];
         };
 
-      genode = prev'.genode.overrideAttrs (attrs: rec {
-        version = "20.11.1";
-        src = fetchgit {
-          inherit (attrs.src) url;
-          rev = "v${version}";
-          sha256 = "0i78idsrgph0g2yir6niar7v827y6qnmd058s6mpvp091sllvlv8";
-        };
-      });
+        genode = prev'.genode.overrideAttrs ({ ... }: rec {
+          version = "20221020";
+          src = final.fetchFromSourcehut {
+            owner = "~ehmry";
+            repo = "nim_genode";
+            rev = version;
+            hash = "sha256-kUbhYKoN/H/fP7ekDYY5rZwZY8UDdcbFBEodthFkmYk=";
+          };
+        });
 
-    });
+        preserves = overrideAttrsTarget ({ ... }: rec {
+          pname = "preserves";
+          version = "20221020";
+          src = final.fetchFromGitea {
+            domain = "git.syndicate-lang.org";
+            owner = "ehmry";
+            repo = "${pname}-nim";
+            rev = version;
+            sha256 = "sha256-yUyt4hAKvEKTFV9KF8994k7RrirQQJ2Jv7ngjbnfXgw=";
+          };
+          dontFixup = true; # this is breaking input propagation?
+        }) prev'.preserves;
+
+        syndicate = overrideAttrsTarget ({ ... }: {
+          dontFixup = true; # this is breaking input propagation?
+        }) prev'.syndicate;
+
+      });
 
   openssl =
     overrideHost { static = true; } # shared library comes out stupid big
diff --git a/tests/default.nix b/tests/default.nix
index 9942b00..6d32cb3 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -16,6 +16,7 @@ let
         ./hello.nix
         ./log.nix
         ./nim.nix
+        ./syndicate
         ./tor.nix
         ./usb.nix
         ./vmm_x86.nix
diff --git a/tests/nim.nix b/tests/nim.nix
index 289b2e0..9763d2e 100644
--- a/tests/nim.nix
+++ b/tests/nim.nix
@@ -1,11 +1,12 @@
 {
   name = "nim";
   machine = { pkgs, ... }: {
-    genode.init.children.test_nim = let
-      testNim = with pkgs;
+    genode.init.children.test_nim = {
+      package = with pkgs;
         nimPackages.buildNimPackage {
           pname = "test_nim";
           inherit (nim) version;
+          nimDefines.posix = {};
           unpackPhase = ''
             mkdir test
             cd test
@@ -16,8 +17,6 @@
             EOF
           '';
         };
-    in {
-      package = testNim;
       configFile = builtins.toFile "nim.dhall" ''
         let Sigil = env:DHALL_SIGIL
 
diff --git a/tests/syndicate/default.nix b/tests/syndicate/default.nix
new file mode 100644
index 0000000..504949c
--- /dev/null
+++ b/tests/syndicate/default.nix
@@ -0,0 +1,53 @@
+{
+  name = "syndicate";
+  machine = { pkgs, ... }: {
+    genode.init.verbose = true;
+    genode.init.children.syndicate_service = {
+      package = with pkgs.nimPackages;
+        buildNimPackage rec {
+          pname = "syndicate";
+          version = "unstable";
+          nimDefines.posix = { };
+          src = ./src;
+          propagatedBuildInputs = [ genode npeg preserves syndicate ];
+          nimBinOnly = true;
+          meta.mainProgram = "test";
+        };
+      extraInputs = with pkgs.genodePackages; [ libc stdcxx ];
+      configFile = builtins.toFile "nim.dhall" ''
+        let Sigil = env:DHALL_SIGIL
+
+        let Init = Sigil.Init
+
+        let Child = Init.Child
+
+        let Libc = Sigil.Libc
+
+        in  λ(binary : Text) →
+              Child.flat
+                Child.Attributes::{
+                , binary
+                , exitPropagate = True
+                , resources = Sigil.Init.Resources::{
+                  , caps = 500
+                  , ram = Sigil.units.MiB 10
+                  }
+                , routes =
+                  [ Sigil.Init.ServiceRoute.parentLabel
+                      "ROM"
+                      (Some "state")
+                      (Some "state")
+                  ]
+                , config =
+                    (Libc.toConfig Libc.default)
+                  with attributes = toMap { ld_verbose = "true" }
+                }
+      '';
+    };
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_until_serial_output("<ROM \"config\"")
+  '';
+}
diff --git a/tests/syndicate/src/test.nim b/tests/syndicate/src/test.nim
new file mode 100644
index 0000000..98cafbb
--- /dev/null
+++ b/tests/syndicate/src/test.nim
@@ -0,0 +1,34 @@
+# SPDX-FileCopyrightText: ☭ 2022 Emery Hemingway
+# SPDX-License-Identifier: AGPL-3.0-or-later.txt
+
+import std/[asyncdispatch, options, streams, strutils, xmltree]
+import genode, genode/[reports, roms]
+import preserves, preserves/xmlhooks, syndicate
+
+type RomAssertion {.preservesRecord: "ROM".} = object
+  name: string
+  content: XmlNode
+
+type RomCallback = proc (t: var Turn; rom: RomClient) {.closure, gcsafe.}
+proc newRomHandler(env: GenodeEnv; label: string; turn: var Turn; cb: RomCallback): RomHandler =
+  ## Create a `RomHandler` that dispatches a callback within a Syndicate `Turn`.
+  let facet = turn.facet
+  result = newRomHandler(env, label) do (rom: RomClient):
+    run(facet) do (turn: var Turn):
+      cb(turn, rom)
+
+componentConstructHook = proc(env: GenodeEnv) =
+
+  bootDataspace("main") do (ds: Ref; turn: var Turn):
+    echo "bootDataspace…"
+    # Syndicate boot hook
+
+    onPublish(turn, ds, grab()) do (a: Assertion):
+      echo "seen in Syndicate dataspace ", ds, " - ", a
+
+    var configHandle, stateHandle: syndicate.Handle
+    let configRom =  newRomHandler(env, "config", turn) do (turn: var Turn; rom: RomClient):
+      # config ROM hook
+      var ass = RomAssertion(name: "config", content: rom.xml)
+      echo "publish ", ass.name, " XML in dataspace: ", ass.content
+      replace(turn, ds, configHandle, ass)
diff --git a/tests/syndicate/src/test.nimble b/tests/syndicate/src/test.nimble
new file mode 100644
index 0000000..b098e1c
--- /dev/null
+++ b/tests/syndicate/src/test.nimble
@@ -0,0 +1 @@
+bin = @["test.nim"]