diff --git a/flake.lock b/flake.lock
index 363b893..522b9f2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,18 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1686968143,
-        "narHash": "sha256-NkXmT9ArJBeu56jo/agURQ1pvqrx0nUHi30yM7sttK8=",
+        "lastModified": 1690860117,
+        "narHash": "sha256-srkCfjMlg777HxDVMfhkIFgRhhtuZjIOIyR2ejLYK+Y=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "56799517d0537a6f3e91a5171af8c4bfd82c092e",
+        "rev": "96d403ee2479f2070050353b94808209f1352edb",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "release-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "type": "indirect"
       }
     },
     "root": {
@@ -48,11 +46,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1686968542,
-        "narHash": "sha256-Gjlj7UeHqMFRAYyefeoLnSjLo8V+0XheIamojNEyTbE=",
+        "lastModified": 1690856601,
+        "narHash": "sha256-OP1w4rwMJscne5ckSfzOjXXQTPzAWM3Mkm4wRmHwCh8=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "01d84cd842e48e89be67e4c2d9dc46aa7709adc5",
+        "rev": "657d170ebe594da9fa32797e38704d45732d0c72",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index e6233ef..9851a2b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,6 @@
   description = "Syndicate utilities";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/release-23.05";
     rust = {
       url = "github:oxalica/rust-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -29,8 +28,29 @@
 
           nimPackages = prev.nimPackages.overrideScope' (final': prev': {
             noiseprotocol = final'.callPackage ./packages/nim/noiseprotocol { };
-            preserves = final'.callPackage ./packages/preserves-nim { };
-            syndicate = final'.callPackage ./packages/syndicate-nim { };
+
+            preserves = prev'.preserves.overrideAttrs (f: p: {
+              version = "20230801";
+              src = prev.fetchFromGitea {
+                domain = "git.syndicate-lang.org";
+                owner = "ehmry";
+                repo = "preserves-nim";
+                rev = f.version;
+                sha256 = "sha256-60QsbXMYYfEWvXQAXu7XSpvg2J9YaGKDkDrfclcK6pc=";
+              };
+            });
+
+            syndicate = prev'.syndicate.overrideAttrs (f: p: {
+              version = "20230801";
+              src = prev.fetchFromGitea {
+                domain = "git.syndicate-lang.org";
+                owner = "ehmry";
+                repo = "syndicate-nim";
+                rev = f.version;
+                hash = "sha256-/mZGWVdQ5FtZf2snPIjTG2tNFVzxQmxvkKuLCAGARYs=";
+              };
+            });
+
             syndicate_utils =
               final'.callPackage ./packages/syndicate_utils-nim { };
             syndicated-open = final'.callPackage ./packages/syndicated-open { };
diff --git a/packages/preserves-nim/default.nix b/packages/preserves-nim/default.nix
deleted file mode 100644
index 580625f..0000000
--- a/packages/preserves-nim/default.nix
+++ /dev/null
@@ -1,47 +0,0 @@
-{ lib, stdenv, buildNimPackage, fetchFromGitea, fetchFromGitHub, runCommand
-, nim-unwrapped, preserves }:
-
-let
-  compiler = runCommand "compiler.nimble" { inherit (nim-unwrapped) src; } ''
-    mkdir -p $out
-    tar xf $src --strip-components=1 -C $out
-  '';
-
-  npeg = fetchFromGitHub {
-    owner = "zevv";
-    repo = "npeg";
-    rev = "1.2.1";
-    hash = "sha256-kN91cp50ZL4INeRWqwrRK6CAkVXUq4rN4YlcN6WL/3Y=";
-  };
-
-in buildNimPackage rec {
-  pname = "preserves";
-  version = "20230530";
-  src = fetchFromGitea {
-    domain = "git.syndicate-lang.org";
-    owner = "ehmry";
-    repo = "${pname}-nim";
-    rev = version;
-    sha256 = "sha256-IRIBGjv4po8VyL873v++ovqz8Vg6a9Qbh/M1fxpQXvY=";
-  };
-
-  propagatedBuildInputs = [ compiler npeg ];
-  propagatedNativeBuildInputs =
-    lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) preserves;
-  # propagate the utilities of this package for this build platform
-  preConfigure = "substituteInPlace preserves.nimble --replace '# bin ' 'bin '";
-
-  postInstall = ''
-    pushd $out/bin
-    for link in preserves_decode preserves_from_json preserves_to_json;
-    do ln -s  preserves_encode $link
-    done
-    popd
-  '';
-  doCheck = true;
-
-  meta = src.meta // {
-    maintainers = [ lib.maintainers.ehmry ];
-    license = lib.licenses.unlicense;
-  };
-}
diff --git a/packages/syndicate-nim/default.nix b/packages/syndicate-nim/default.nix
deleted file mode 100644
index c8cf996..0000000
--- a/packages/syndicate-nim/default.nix
+++ /dev/null
@@ -1,36 +0,0 @@
-{ lib, buildNimPackage, fetchFromGitea, fetchFromGitHub, preserves }:
-
-let
-  hashlib = buildNimPackage rec {
-    pname = "hashlib";
-    version = "1.0.1";
-
-    src = fetchFromGitHub {
-      owner = "khchen";
-      repo = pname;
-      rev = "84e0247555e4488594975900401baaf5bbbfb531";
-      hash = "sha256-nWNThelCh0LPVU7ryZgS/23hRRvJDVL2xWbQibb+zN0=";
-    };
-    doCheck = true;
-  };
-in buildNimPackage rec {
-  pname = "syndicate";
-  version = "20230530";
-
-  src = fetchFromGitea {
-    domain = "git.syndicate-lang.org";
-    owner = "ehmry";
-    repo = "${pname}-nim";
-    rev = version;
-    hash = "sha256-lUHoMSQwUlz9EDMvpFL9GlrwbwMvZDILSmuakONwe50=";
-  };
-
-  propagatedBuildInputs = [ hashlib preserves ];
-
-  doCheck = true;
-
-  meta = src.meta // {
-    maintainers = [ lib.maintainers.ehmry ];
-    license = lib.licenses.unlicense;
-  };
-}
diff --git a/packages/syndicate_utils-nim/default.nix b/packages/syndicate_utils-nim/default.nix
index 5d2b7cb..bab0922 100644
--- a/packages/syndicate_utils-nim/default.nix
+++ b/packages/syndicate_utils-nim/default.nix
@@ -1,21 +1,21 @@
-{ lib, buildNimPackage, fetchFromGitea, fetchFromGitHub, syndicate }:
+{ lib, buildNimPackage, fetchFromGitea, illwill, syndicate }:
 
-buildNimPackage rec {
+buildNimPackage (final: prev: {
   pname = "syndicate_utils";
-  version = "20230701";
+  version = "20230801";
 
   src = fetchFromGitea {
     domain = "git.syndicate-lang.org";
     owner = "ehmry";
-    repo = pname;
-    rev = version;
-    hash = "sha256-lkgYogxQOoVX8gywdty8sgYv9oHl8b8r+SIv/I6pCno=";
+    repo = final.pname;
+    rev = final.version;
+    hash = "sha256-O9n9y0v0cQg5b2P4GjOEKYj6t1fGTMy4v/QpeAScv2Q=";
   };
 
-  propagatedBuildInputs = [ syndicate ];
+  propagatedBuildInputs = [ illwill syndicate ];
 
-  meta = src.meta // {
+  meta = final.src.meta // {
     maintainers = [ lib.maintainers.ehmry ];
     license = lib.licenses.unlicense;
   };
-}
+})