diff --git a/contrib/nixos/modules/copyparty.nix b/contrib/nixos/modules/copyparty.nix
index 2f13f07b..cd4fef40 100644
--- a/contrib/nixos/modules/copyparty.nix
+++ b/contrib/nixos/modules/copyparty.nix
@@ -4,28 +4,31 @@
   lib,
   ...
 }:
-with lib; let
-  mkKeyValue = key: value:
-    if value == true
-    then
+with lib;
+let
+  mkKeyValue =
+    key: value:
+    if value == true then
       # sets with a true boolean value are coerced to just the key name
       key
-    else if value == false
-    then
+    else if value == false then
       # or omitted completely when false
       ""
-    else (generators.mkKeyValueDefault {inherit mkValueString;} ": " key value);
+    else
+      (generators.mkKeyValueDefault { inherit mkValueString; } ": " key value);
 
-  mkAttrsString = value: (generators.toKeyValue {inherit mkKeyValue;} value);
+  mkAttrsString = value: (generators.toKeyValue { inherit mkKeyValue; } value);
 
-  mkValueString = value:
-    if isList value
-    then (concatStringsSep ", " (map mkValueString value))
-    else if isAttrs value
-    then "\n" + (mkAttrsString value)
-    else (generators.mkValueStringDefault {} value);
+  mkValueString =
+    value:
+    if isList value then
+      (concatStringsSep ", " (map mkValueString value))
+    else if isAttrs value then
+      "\n" + (mkAttrsString value)
+    else
+      (generators.mkValueStringDefault { } value);
 
-  mkSectionName = value: "[" + (escape ["[" "]"] value) + "]";
+  mkSectionName = value: "[" + (escape [ "[" "]" ] value) + "]";
 
   mkSection = name: attrs: ''
     ${mkSectionName name}
@@ -57,7 +60,8 @@ with lib; let
   externalCacheDir = "/var/cache/copyparty";
   externalStateDir = "/var/lib/copyparty";
   defaultShareDir = "${externalStateDir}/data";
-in {
+in
+{
   options.services.copyparty = {
     enable = mkEnableOption "web-based file manager";
 
@@ -128,22 +132,27 @@ in {
     };
 
     accounts = mkOption {
-      type = types.attrsOf (types.submodule ({...}: {
-        options = {
-          passwordFile = mkOption {
-            type = types.str;
-            description = ''
-              Runtime file path to a file containing the user password.
-              Must be readable by the copyparty user.
-            '';
-            example = "/run/keys/copyparty/ed";
-          };
-        };
-      }));
+      type = types.attrsOf (
+        types.submodule (
+          { ... }:
+          {
+            options = {
+              passwordFile = mkOption {
+                type = types.str;
+                description = ''
+                  Runtime file path to a file containing the user password.
+                  Must be readable by the copyparty user.
+                '';
+                example = "/run/keys/copyparty/ed";
+              };
+            };
+          }
+        )
+      );
       description = ''
         A set of copyparty accounts to create.
       '';
-      default = {};
+      default = { };
       example = literalExpression ''
         {
           ed.passwordFile = "/run/keys/copyparty/ed";
@@ -152,74 +161,81 @@ in {
     };
 
     volumes = mkOption {
-      type = types.attrsOf (types.submodule ({...}: {
-        options = {
-          path = mkOption {
-            type = types.path;
-            description = ''
-              Path of a directory to share.
-            '';
-          };
-          access = mkOption {
-            type = types.attrs;
-            description = ''
-              Attribute list of permissions and the users to apply them to.
-
-              The key must be a string containing any combination of allowed permission:
-                "r" (read):   list folder contents, download files
-                "w" (write):  upload files; need "r" to see the uploads
-                "m" (move):   move files and folders; need "w" at destination
-                "d" (delete): permanently delete files and folders
-                "g" (get):    download files, but cannot see folder contents
-                "G" (upget):  "get", but can see filekeys of their own uploads
-                "h" (html):   "get", but folders return their index.html
-                "a" (admin):  can see uploader IPs, config-reload
-
-              For example: "rwmd"
-
-              The value must be one of:
-                an account name, defined in `accounts`
-                a list of account names
-                "*", which means "any account"
-            '';
-            example = literalExpression ''
-              {
-                # wG = write-upget = see your own uploads only
-                wG = "*";
-                # read-write-modify-delete for users "ed" and "k"
-                rwmd = ["ed" "k"];
+      type = types.attrsOf (
+        types.submodule (
+          { ... }:
+          {
+            options = {
+              path = mkOption {
+                type = types.path;
+                description = ''
+                  Path of a directory to share.
+                '';
               };
-            '';
-          };
-          flags = mkOption {
-            type = types.attrs;
-            description = ''
-              Attribute list of volume flags to apply.
-              See `${getExe cfg.package} --help-flags` for more details.
-            '';
-            example = literalExpression ''
-              {
-                # "fk" enables filekeys (necessary for upget permission) (4 chars long)
-                fk = 4;
-                # scan for new files every 60sec
-                scan = 60;
-                # volflag "e2d" enables the uploads database
-                e2d = true;
-                # "d2t" disables multimedia parsers (in case the uploads are malicious)
-                d2t = true;
-                # skips hashing file contents if path matches *.iso
-                nohash = "\.iso$";
+              access = mkOption {
+                type = types.attrs;
+                description = ''
+                  Attribute list of permissions and the users to apply them to.
+
+                  The key must be a string containing any combination of allowed permission:
+                    "r" (read):   list folder contents, download files
+                    "w" (write):  upload files; need "r" to see the uploads
+                    "m" (move):   move files and folders; need "w" at destination
+                    "d" (delete): permanently delete files and folders
+                    "g" (get):    download files, but cannot see folder contents
+                    "G" (upget):  "get", but can see filekeys of their own uploads
+                    "h" (html):   "get", but folders return their index.html
+                    "a" (admin):  can see uploader IPs, config-reload
+
+                  For example: "rwmd"
+
+                  The value must be one of:
+                    an account name, defined in `accounts`
+                    a list of account names
+                    "*", which means "any account"
+                '';
+                example = literalExpression ''
+                  {
+                    # wG = write-upget = see your own uploads only
+                    wG = "*";
+                    # read-write-modify-delete for users "ed" and "k"
+                    rwmd = ["ed" "k"];
+                  };
+                '';
               };
-            '';
-            default = {};
-          };
-        };
-      }));
+              flags = mkOption {
+                type = types.attrs;
+                description = ''
+                  Attribute list of volume flags to apply.
+                  See `${getExe cfg.package} --help-flags` for more details.
+                '';
+                example = literalExpression ''
+                  {
+                    # "fk" enables filekeys (necessary for upget permission) (4 chars long)
+                    fk = 4;
+                    # scan for new files every 60sec
+                    scan = 60;
+                    # volflag "e2d" enables the uploads database
+                    e2d = true;
+                    # "d2t" disables multimedia parsers (in case the uploads are malicious)
+                    d2t = true;
+                    # skips hashing file contents if path matches *.iso
+                    nohash = "\.iso$";
+                  };
+                '';
+                default = { };
+              };
+            };
+          }
+        )
+      );
       description = "A set of copyparty volumes to create";
       default = {
         "/" = {
           path = defaultShareDir;
-          access = {r = "*";};
+          access = {
+            r = "*";
+          };
         };
       };
       example = literalExpression ''
@@ -238,93 +254,90 @@ in {
     };
   };
 
-  config = mkIf cfg.enable (let
-    command = "${getExe cfg.package} -c ${runtimeConfigPath}";
-  in {
-    systemd.services.copyparty = {
-      description = "http file sharing hub";
-      wantedBy = ["multi-user.target"];
+  config = mkIf cfg.enable (
+    let
+      command = "${getExe cfg.package} -c ${runtimeConfigPath}";
+    in
+    {
+      systemd.services.copyparty = {
+        description = "http file sharing hub";
+        wantedBy = [ "multi-user.target" ];
 
-      environment = {
-        PYTHONUNBUFFERED = "true";
-        XDG_CONFIG_HOME = externalStateDir;
-      };
+        environment = {
+          PYTHONUNBUFFERED = "true";
+          XDG_CONFIG_HOME = externalStateDir;
+        };
 
-      preStart = let
-        replaceSecretCommand = name: attrs: "${getExe pkgs.replace-secret} '${
-          passwordPlaceholder name
-        }' '${attrs.passwordFile}' ${runtimeConfigPath}";
-      in ''
-        set -euo pipefail
-        install -m 600 ${configFile} ${runtimeConfigPath}
-        ${concatStringsSep "\n"
-          (mapAttrsToList replaceSecretCommand cfg.accounts)}
-      '';
+        preStart =
+          let
+            replaceSecretCommand =
+              name: attrs:
+              "${getExe pkgs.replace-secret} '${passwordPlaceholder name}' '${attrs.passwordFile}' ${runtimeConfigPath}";
+          in
+          ''
+            set -euo pipefail
+            install -m 600 ${configFile} ${runtimeConfigPath}
+            ${concatStringsSep "\n" (mapAttrsToList replaceSecretCommand cfg.accounts)}
+          '';
 
-      serviceConfig = {
-        Type = "simple";
-        ExecStart = command;
-        # Hardening options
-        User = cfg.user;
-        Group = cfg.group;
-        RuntimeDirectory = ["copyparty"];
-        RuntimeDirectoryMode = "0700";
-        StateDirectory = ["copyparty"];
-        StateDirectoryMode = "0700";
-        CacheDirectory = lib.mkIf (cfg.settings ? hist) ["copyparty"];
-        CacheDirectoryMode = lib.mkIf (cfg.settings ? hist) "0700";
-        WorkingDirectory = externalStateDir;
-        BindReadOnlyPaths =
-          [
+        serviceConfig = {
+          Type = "simple";
+          ExecStart = command;
+          # Hardening options
+          User = cfg.user;
+          Group = cfg.group;
+          RuntimeDirectory = [ "copyparty" ];
+          RuntimeDirectoryMode = "0700";
+          StateDirectory = [ "copyparty" ];
+          StateDirectoryMode = "0700";
+          CacheDirectory = lib.mkIf (cfg.settings ? hist) [ "copyparty" ];
+          CacheDirectoryMode = lib.mkIf (cfg.settings ? hist) "0700";
+          WorkingDirectory = externalStateDir;
+          BindReadOnlyPaths = [
             "/nix/store"
             "-/etc/resolv.conf"
             "-/etc/nsswitch.conf"
             "-/etc/group"
             "-/etc/hosts"
             "-/etc/localtime"
-          ]
-          ++ (mapAttrsToList (k: v: "-${v.passwordFile}") cfg.accounts);
-        BindPaths =
-          (
-            if cfg.settings ? hist
-            then [cfg.settings.hist]
-            else []
-          )
-          ++ [externalStateDir]
-          ++ (mapAttrsToList (k: v: v.path) cfg.volumes);
-        # ProtectSystem = "strict";
-        # Note that unlike what 'ro' implies,
-        # this actually makes it impossible to read anything in the root FS,
-        # except for things explicitly mounted via `RuntimeDirectory`, `StateDirectory`, `CacheDirectory`, and `BindReadOnlyPaths`.
-        # This is because TemporaryFileSystem creates a *new* *empty* filesystem for the process, so only bindmounts are visible.
-        TemporaryFileSystem = "/:ro";
-        PrivateTmp = true;
-        PrivateDevices = true;
-        ProtectKernelTunables = true;
-        ProtectControlGroups = true;
-        RestrictSUIDSGID = true;
-        PrivateMounts = true;
-        ProtectKernelModules = true;
-        ProtectKernelLogs = true;
-        ProtectHostname = true;
-        ProtectClock = true;
-        ProtectProc = "invisible";
-        ProcSubset = "pid";
-        RestrictNamespaces = true;
-        RemoveIPC = true;
-        UMask = "0077";
-        LimitNOFILE = cfg.openFilesLimit;
-        NoNewPrivileges = true;
-        LockPersonality = true;
-        RestrictRealtime = true;
-        MemoryDenyWriteExecute = true;
+          ] ++ (mapAttrsToList (k: v: "-${v.passwordFile}") cfg.accounts);
+          BindPaths =
+            (if cfg.settings ? hist then [ cfg.settings.hist ] else [ ])
+            ++ [ externalStateDir ]
+            ++ (mapAttrsToList (k: v: v.path) cfg.volumes);
+          # ProtectSystem = "strict";
+          # Note that unlike what 'ro' implies,
+          # this actually makes it impossible to read anything in the root FS,
+          # except for things explicitly mounted via `RuntimeDirectory`, `StateDirectory`, `CacheDirectory`, and `BindReadOnlyPaths`.
+          # This is because TemporaryFileSystem creates a *new* *empty* filesystem for the process, so only bindmounts are visible.
+          TemporaryFileSystem = "/:ro";
+          PrivateTmp = true;
+          PrivateDevices = true;
+          ProtectKernelTunables = true;
+          ProtectControlGroups = true;
+          RestrictSUIDSGID = true;
+          PrivateMounts = true;
+          ProtectKernelModules = true;
+          ProtectKernelLogs = true;
+          ProtectHostname = true;
+          ProtectClock = true;
+          ProtectProc = "invisible";
+          ProcSubset = "pid";
+          RestrictNamespaces = true;
+          RemoveIPC = true;
+          UMask = "0077";
+          LimitNOFILE = cfg.openFilesLimit;
+          NoNewPrivileges = true;
+          LockPersonality = true;
+          RestrictRealtime = true;
+          MemoryDenyWriteExecute = true;
+        };
       };
-    };
 
-    # ensure volumes exist:
-    systemd.tmpfiles.settings."copyparty" = (
-      lib.attrsets.mapAttrs' (
-        name: value:
+      # ensure volumes exist:
+      systemd.tmpfiles.settings."copyparty" = (
+        lib.attrsets.mapAttrs' (
+          name: value:
           lib.attrsets.nameValuePair (value.path) {
             d = {
               #: in front of things means it wont change it if the directory already exists.
@@ -333,32 +346,30 @@ in {
               mode = ":755";
             };
           }
-      )
-      cfg.volumes
-    );
+        ) cfg.volumes
+      );
 
-    users.groups.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") {};
-    users.users.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") {
-      description = "Service user for copyparty";
-      group = "copyparty";
-      home = externalStateDir;
-      isSystemUser = true;
-    };
-    environment.systemPackages = lib.mkIf cfg.mkHashWrapper [
-      (pkgs.writeShellScriptBin
-      "copyparty-hash"
-      ''
-        set -a  # automatically export variables
-        # set same environment variables as the systemd service
-        ${lib.pipe config.systemd.services.copyparty.environment [
-          (lib.filterAttrs (n: v: v != null && n != "PATH"))
-          (lib.mapAttrs (_: v: "${v}"))
-          (lib.toShellVars)
-        ]}
-        PATH=${config.systemd.services.copyparty.environment.PATH}:$PATH
+      users.groups.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") { };
+      users.users.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") {
+        description = "Service user for copyparty";
+        group = "copyparty";
+        home = externalStateDir;
+        isSystemUser = true;
+      };
+      environment.systemPackages = lib.mkIf cfg.mkHashWrapper [
+        (pkgs.writeShellScriptBin "copyparty-hash" ''
+          set -a  # automatically export variables
+          # set same environment variables as the systemd service
+          ${lib.pipe config.systemd.services.copyparty.environment [
+            (lib.filterAttrs (n: v: v != null && n != "PATH"))
+            (lib.mapAttrs (_: v: "${v}"))
+            (lib.toShellVars)
+          ]}
+          PATH=${config.systemd.services.copyparty.environment.PATH}:$PATH
 
-        exec ${command} --ah-cli
-      '')
-    ];
-  });
+          exec ${command} --ah-cli
+        '')
+      ];
+    }
+  );
 }
diff --git a/contrib/package/nix/copyparty/default.nix b/contrib/package/nix/copyparty/default.nix
index d34f9ae7..28d733ab 100644
--- a/contrib/package/nix/copyparty/default.nix
+++ b/contrib/package/nix/copyparty/default.nix
@@ -1,41 +1,67 @@
-{ lib, stdenv, makeWrapper, fetchurl, util-linux, python, jinja2, impacket, pyftpdlib, pyopenssl, argon2-cffi, pillow, pyvips, pyzmq, ffmpeg, mutagen,
+{
+  lib,
+  stdenv,
+  makeWrapper,
+  fetchurl,
+  util-linux,
+  python,
+  jinja2,
+  impacket,
+  pyopenssl,
+  cfssl,
+  argon2-cffi,
+  pillow,
+  pyvips,
+  pyzmq,
+  ffmpeg,
+  mutagen,
 
-# use argon2id-hashed passwords in config files (sha2 is always available)
-withHashedPasswords ? true,
+  # use argon2id-hashed passwords in config files (sha2 is always available)
+  withHashedPasswords ? true,
 
-# generate TLS certificates on startup (pointless when reverse-proxied)
-withCertgen ? false,
+  # generate TLS certificates on startup (pointless when reverse-proxied)
+  withCertgen ? false,
 
-# create thumbnails with Pillow; faster than FFmpeg / MediaProcessing
-withThumbnails ? true,
+  # create thumbnails with Pillow; faster than FFmpeg / MediaProcessing
+  withThumbnails ? true,
 
-# create thumbnails with PyVIPS; even faster, uses more memory
-# -- can be combined with Pillow to support more filetypes
-withFastThumbnails ? false,
+  # create thumbnails with PyVIPS; even faster, uses more memory
+  # -- can be combined with Pillow to support more filetypes
+  withFastThumbnails ? false,
 
-# enable FFmpeg; thumbnails for most filetypes (also video and audio), extract audio metadata, transcode audio to opus
-# -- possibly dangerous if you allow anonymous uploads, since FFmpeg has a huge attack surface
-# -- can be combined with Thumbnails and/or FastThumbnails, since FFmpeg is slower than both
-withMediaProcessing ? true,
+  # enable FFmpeg; thumbnails for most filetypes (also video and audio), extract audio metadata, transcode audio to opus
+  # -- possibly dangerous if you allow anonymous uploads, since FFmpeg has a huge attack surface
+  # -- can be combined with Thumbnails and/or FastThumbnails, since FFmpeg is slower than both
+  withMediaProcessing ? true,
 
-# if MediaProcessing is not enabled, you probably want this instead (less accurate, but much safer and faster)
-withBasicAudioMetadata ? false,
+  # if MediaProcessing is not enabled, you probably want this instead (less accurate, but much safer and faster)
+  withBasicAudioMetadata ? false,
 
-# send ZeroMQ messages from event-hooks
-withZeroMQ ? true,
+  # send ZeroMQ messages from event-hooks
+  withZeroMQ ? true,
 
-# enable FTPS support in the FTP server
-withFTPS ? false,
+  # enable FTPS support in the FTP server
+  withFTPS ? false,
 
-# samba/cifs server; dangerous and buggy, enable if you really need it
-withSMB ? false,
+  # samba/cifs server; dangerous and buggy, enable if you really need it
+  withSMB ? false,
+
+  # extra packages to add to the PATH
+  extraPackages ? [ ],
+
+  # function that accepts a python packageset and returns a list of packages to
+  # be added to the python venv. useful for scripts and such that require
+  # additional dependencies
+  extraPythonPackages ? (_p: [ ]),
 
 }:
 
 let
   pinData = lib.importJSON ./pin.json;
-  pyEnv = python.withPackages (ps:
-    with ps; [
+  pyEnv = python.withPackages (
+    ps:
+    with ps;
+    [
       jinja2
     ]
     ++ lib.optional withSMB impacket
@@ -47,22 +73,36 @@ let
     ++ lib.optional withBasicAudioMetadata mutagen
     ++ lib.optional withHashedPasswords argon2-cffi
     ++ lib.optional withZeroMQ pyzmq
-    );
-in stdenv.mkDerivation {
+    ++ (extraPythonPackages ps)
+  );
+
+  runtimeDeps = ([ util-linux ] ++ extraPackages ++ lib.optional withMediaProcessing ffmpeg);
+in
+stdenv.mkDerivation {
   pname = "copyparty";
-  version = pinData.version;
+  inherit (pinData) version;
   src = fetchurl {
-    url = pinData.url;
-    hash = pinData.hash;
+    inherit (pinData) url hash;
   };
-  buildInputs = [ makeWrapper ];
+  nativeBuildInputs = [ makeWrapper ];
   dontUnpack = true;
-  dontBuild = true;
   installPhase = ''
     install -Dm755 $src $out/share/copyparty-sfx.py
     makeWrapper ${pyEnv.interpreter} $out/bin/copyparty \
-      --set PATH '${lib.makeBinPath ([ util-linux ] ++ lib.optional withMediaProcessing ffmpeg)}:$PATH' \
-      --add-flags "$out/share/copyparty-sfx.py"
+      --prefix PATH : ${lib.makeBinPath runtimeDeps} \
+      --add-flag $out/share/copyparty-sfx.py
   '';
-  meta.mainProgram = "copyparty";
+  meta = {
+    description = "Turn almost any device into a file server";
+    longDescription = ''
+      Portable file server with accelerated resumable uploads, dedup, WebDAV,
+      FTP, TFTP, zeroconf, media indexer, thumbnails++ all in one file, no deps
+    '';
+    homepage = "https://github.com/9001/copyparty";
+    changelog = "https://github.com/9001/copyparty/releases/tag/v${pinData.version}";
+    license = lib.licenses.mit;
+    inherit (python.meta) platforms;
+    mainProgram = "copyparty";
+    sourceProvenance = [ lib.sourceTypes.binaryBytecode ];
+  };
 }
diff --git a/contrib/package/nix/partyfuse/default.nix b/contrib/package/nix/partyfuse/default.nix
new file mode 100644
index 00000000..59faa914
--- /dev/null
+++ b/contrib/package/nix/partyfuse/default.nix
@@ -0,0 +1,26 @@
+{
+  stdenvNoCC,
+  copyparty,
+  python3,
+  makeBinaryWrapper,
+}:
+let
+  python = python3.withPackages (p: [ p.fusepy ]);
+in
+stdenvNoCC.mkDerivation {
+  pname = "partyfuse";
+  inherit (copyparty) version meta;
+  src = ../../../..;
+
+  nativeBuildInputs = [ makeBinaryWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm444 bin/partyfuse.py -t $out/share/copyparty
+    makeWrapper ${python.interpreter} $out/bin/partyfuse \
+      --add-flag $out/share/copyparty/partyfuse.py
+
+    runHook postInstall
+  '';
+}
diff --git a/contrib/package/nix/u2c/default.nix b/contrib/package/nix/u2c/default.nix
new file mode 100644
index 00000000..dc1e4c56
--- /dev/null
+++ b/contrib/package/nix/u2c/default.nix
@@ -0,0 +1,24 @@
+{
+  stdenvNoCC,
+  copyparty,
+  python312,
+  makeBinaryWrapper,
+}:
+stdenvNoCC.mkDerivation {
+  pname = "u2c";
+  inherit (copyparty) version meta;
+  src = ../../../..;
+
+  nativeBuildInputs = [ makeBinaryWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm444 bin/u2c.py -t $out/share/copyparty
+    mkdir $out/bin
+    makeWrapper ${python312.interpreter} $out/bin/u2c \
+      --add-flag $out/share/copyparty/u2c.py
+
+    runHook postInstall
+  '';
+}
diff --git a/flake.nix b/flake.nix
index be9d0678..5f39d605 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,16 +4,30 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+    }:
     {
       nixosModules.default = ./contrib/nixos/modules/copyparty.nix;
-      overlays.default = self: super: {
-        copyparty =
-          self.python3.pkgs.callPackage ./contrib/package/nix/copyparty {
-            ffmpeg = self.ffmpeg-full;
-          };
+      overlays.default = final: prev: rec {
+        copyparty = final.python3.pkgs.callPackage ./contrib/package/nix/copyparty {
+          ffmpeg = final.ffmpeg-full;
+        };
+
+        partyfuse = prev.callPackage ./contrib/package/nix/partyfuse {
+          inherit copyparty;
+        };
+
+        u2c = prev.callPackage ./contrib/package/nix/u2c {
+          inherit copyparty;
+        };
       };
-    } // flake-utils.lib.eachDefaultSystem (system:
+    }
+    // flake-utils.lib.eachDefaultSystem (
+      system:
       let
         pkgs = import nixpkgs {
           inherit system;
@@ -22,10 +36,31 @@
           };
           overlays = [ self.overlays.default ];
         };
-      in {
+      in
+      {
+        # check that copyparty builds with all optionals turned on
+        checks.copyparty-full = self.packages.${system}.copyparty.override {
+          withHashedPasswords = true;
+          withCertgen = true;
+          withThumbnails = true;
+          withFastThumbnails = true;
+          withMediaProcessing = true;
+          withBasicAudioMetadata = true;
+          withZeroMQ = true;
+          withFTPS = true;
+          withSMB = true;
+        };
+
         packages = {
-          inherit (pkgs) copyparty;
+          inherit (pkgs)
+            copyparty
+            partyfuse
+            u2c
+            ;
           default = self.packages.${system}.copyparty;
         };
-      });
+
+        formatter = pkgs.nixfmt-tree;
+      }
+    );
 }