diff --git a/default.nix b/default.nix
deleted file mode 100644
index e309c7a..0000000
--- a/default.nix
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-  sources ? import ./nix/sources.nix,
-  system ? builtins.currentSystem,
-  crossSystem ? null,
-  config ? {},
-  alejandraUnstable ? (import sources.nixpkgsUnstable {}).alejandra,
-} @ args:
-with import ./nix args; {
-  shell = mkShell {
-    inherit (import sources.niv {}) niv;
-    buildInputs = [
-      alejandraUnstable # The Uncompromising Nix Code Formatter
-      niv
-      nixopsUnstable # work around for issue #127423
-      treefmt # one CLI to format the code tree
-    ];
-    NIX_PATH = "nixpkgs=${sources.nixpkgs}";
-    NIXOPS_DEPLOYMENT = "${globals.deploymentName}";
-  };
-}
diff --git a/nix/default.nix b/nix/default.nix
deleted file mode 100644
index 9831bf2..0000000
--- a/nix/default.nix
+++ /dev/null
@@ -1,31 +0,0 @@
-{ sources ? import ./sources.nix
-, system ? builtins.currentSystem
-, crossSystem ? null
-, config ? {} }:
-
-let
-  # our own overlays:
-  local-overlays = [
-  ];
-
-  globals =
-    if builtins.pathExists ../globals.nix
-    then [(import ../globals.nix)]
-    else builtins.trace "globals.nix missing, please add symlink" [];
-
-  # merge upstream sources with our own:
-  upstream-overlays = [
-      ( _: super: {
-
-      sources = (super.sources or {}) // sources;
-    })
-  ];
-
-  overlays =
-    local-overlays ++
-    globals ++
-    upstream-overlays;
-in
-  import sources.nixpkgs {
-    inherit overlays system crossSystem config;
-  }
diff --git a/nix/sources.json b/nix/sources.json
deleted file mode 100644
index 5082374..0000000
--- a/nix/sources.json
+++ /dev/null
@@ -1,63 +0,0 @@
-{
-    "hakyll-skeleton": {
-        "sha256": "12072xpvqvy127gav887kbpq3446nf2bdnzfifxjmla4rl7hsbvc",
-        "type": "tarball",
-        "url": "https://source.jfdic.org/jfdic/hakyll-skeleton/archive/c0df6f6abed90c66e2eff2106ce89bac0a3344db.tar.gz",
-        "url_template": "https://source.jfdic.org/jfdic/hakyll-skeleton/archive/c0df6f6abed90c66e2eff2106ce89bac0a3344db.tar.gz"
-    },
-    "jfdic-web": {
-        "sha256": "1nxm6qblxjnpw23c5pahqqpjcy49agkgxma4gpr15bsx4zx1dfvh",
-        "type": "tarball",
-        "url": "https://source.jfdic.org/JFDIC/jfdic-web/archive/6765cb4251eef6d660b761f7f40f99dbf51a739f.tar.gz",
-        "url_template": "https://source.jfdic.org/JFDIC/jfdic-web/archive/6765cb4251eef6d660b761f7f40f99dbf51a739f.tar.gz"
-    },
-    "niv": {
-        "branch": "master",
-        "description": "Easy dependency management for Nix projects",
-        "homepage": "https://github.com/nmattia/niv",
-        "owner": "nmattia",
-        "repo": "niv",
-        "rev": "82e5cd1ad3c387863f0545d7591512e76ab0fc41",
-        "sha256": "090l219mzc0gi33i3psgph6s2pwsc8qy4lyrqjdj4qzkvmaj65a7",
-        "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/82e5cd1ad3c387863f0545d7591512e76ab0fc41.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "nixpkgs": {
-        "branch": "nixos-22.05",
-        "builtin": false,
-        "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
-        "homepage": "https://github.com/NixOS/nixpkgs",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "c06d5fa9c605d143b15cafdbbb61c7c95388d76e",
-        "sha256": "04fmbldsacmb8wba825didq1sj3r9na24ff3h993nimjav5mp4pv",
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/c06d5fa9c605d143b15cafdbbb61c7c95388d76e.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "nixpkgsUnstable": {
-        "branch": "nixos-unstable",
-        "description": "Nix Packages collection",
-        "homepage": "",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "5f43d8b088d3771274bcfb69d3c7435b1121ac88",
-        "sha256": "1fh5inlikm3090l0n14g8byiz7vzhna377pkvv2a7armwl1gs8ql",
-        "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/5f43d8b088d3771274bcfb69d3c7435b1121ac88.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "resrok-web": {
-        "sha256": "0g6w42l0nmqbkfbk6jfqjhxpd23c6b2bw4zz4rnpy0ba351j1hgz",
-        "type": "tarball",
-        "url": "https://source.jfdic.org/resrok/resrok-web/archive/e77bea1a3cc4da6f54c62ba21ca926392e842a21.tar.gz",
-        "url_template": "https://source.jfdic.org/resrok/resrok-web/archive/e77bea1a3cc4da6f54c62ba21ca926392e842a21.tar.gz"
-    },
-    "voc-web": {
-        "sha256": "0asy2pylb790fjz2y2jcqm94afpnqbhyrf1ndkvv2ph9m9nh3m5x",
-        "type": "tarball",
-        "url": "https://source.jfdic.org/voc/voc-web/archive/85eb99b5a0a010d8819ea6850c5a359d9ec397b9.tar.gz",
-        "url_template": "https://source.jfdic.org/voc/voc-web/archive/85eb99b5a0a010d8819ea6850c5a359d9ec397b9.tar.gz"
-    }
-}
diff --git a/nix/sources.nix b/nix/sources.nix
deleted file mode 100644
index 9a01c8a..0000000
--- a/nix/sources.nix
+++ /dev/null
@@ -1,194 +0,0 @@
-# This file has been generated by Niv.
-
-let
-
-  #
-  # The fetchers. fetch_<type> fetches specs of type <type>.
-  #
-
-  fetch_file = pkgs: name: spec:
-    let
-      name' = sanitizeName name + "-src";
-    in
-      if spec.builtin or true then
-        builtins_fetchurl { inherit (spec) url sha256; name = name'; }
-      else
-        pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
-
-  fetch_tarball = pkgs: name: spec:
-    let
-      name' = sanitizeName name + "-src";
-    in
-      if spec.builtin or true then
-        builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
-      else
-        pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
-
-  fetch_git = name: spec:
-    let
-      ref =
-        if spec ? ref then spec.ref else
-          if spec ? branch then "refs/heads/${spec.branch}" else
-            if spec ? tag then "refs/tags/${spec.tag}" else
-              abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
-      submodules = if spec ? submodules then spec.submodules else false;
-      submoduleArg =
-        let
-          nixSupportsSubmodules = builtins.compareVersions builtins.nixVersion "2.4" >= 0;
-          emptyArgWithWarning =
-            if submodules == true
-            then
-              builtins.trace
-                (
-                  "The niv input \"${name}\" uses submodules "
-                  + "but your nix's (${builtins.nixVersion}) builtins.fetchGit "
-                  + "does not support them"
-                )
-                {}
-            else {};
-        in
-          if nixSupportsSubmodules
-          then { inherit submodules; }
-          else emptyArgWithWarning;
-    in
-      builtins.fetchGit
-        ({ url = spec.repo; inherit (spec) rev; inherit ref; } // submoduleArg);
-
-  fetch_local = spec: spec.path;
-
-  fetch_builtin-tarball = name: throw
-    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
-        $ niv modify ${name} -a type=tarball -a builtin=true'';
-
-  fetch_builtin-url = name: throw
-    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
-        $ niv modify ${name} -a type=file -a builtin=true'';
-
-  #
-  # Various helpers
-  #
-
-  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
-  sanitizeName = name:
-    (
-      concatMapStrings (s: if builtins.isList s then "-" else s)
-        (
-          builtins.split "[^[:alnum:]+._?=-]+"
-            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
-        )
-    );
-
-  # The set of packages used when specs are fetched using non-builtins.
-  mkPkgs = sources: system:
-    let
-      sourcesNixpkgs =
-        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; };
-      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
-      hasThisAsNixpkgsPath = <nixpkgs> == ./.;
-    in
-      if builtins.hasAttr "nixpkgs" sources
-      then sourcesNixpkgs
-      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
-        import <nixpkgs> {}
-      else
-        abort
-          ''
-            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
-            add a package called "nixpkgs" to your sources.json.
-          '';
-
-  # The actual fetching function.
-  fetch = pkgs: name: spec:
-
-    if ! builtins.hasAttr "type" spec then
-      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
-    else if spec.type == "file" then fetch_file pkgs name spec
-    else if spec.type == "tarball" then fetch_tarball pkgs name spec
-    else if spec.type == "git" then fetch_git name spec
-    else if spec.type == "local" then fetch_local spec
-    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
-    else if spec.type == "builtin-url" then fetch_builtin-url name
-    else
-      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
-
-  # If the environment variable NIV_OVERRIDE_${name} is set, then use
-  # the path directly as opposed to the fetched source.
-  replace = name: drv:
-    let
-      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
-      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
-    in
-      if ersatz == "" then drv else
-        # this turns the string into an actual Nix path (for both absolute and
-        # relative paths)
-        if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
-
-  # Ports of functions for older nix versions
-
-  # a Nix version of mapAttrs if the built-in doesn't exist
-  mapAttrs = builtins.mapAttrs or (
-    f: set: with builtins;
-    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
-  );
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
-  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
-  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
-  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
-  concatMapStrings = f: list: concatStrings (map f list);
-  concatStrings = builtins.concatStringsSep "";
-
-  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
-  optionalAttrs = cond: as: if cond then as else {};
-
-  # fetchTarball version that is compatible between all the versions of Nix
-  builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
-    let
-      inherit (builtins) lessThan nixVersion fetchTarball;
-    in
-      if lessThan nixVersion "1.12" then
-        fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
-      else
-        fetchTarball attrs;
-
-  # fetchurl version that is compatible between all the versions of Nix
-  builtins_fetchurl = { url, name ? null, sha256 }@attrs:
-    let
-      inherit (builtins) lessThan nixVersion fetchurl;
-    in
-      if lessThan nixVersion "1.12" then
-        fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
-      else
-        fetchurl attrs;
-
-  # Create the final "sources" from the config
-  mkSources = config:
-    mapAttrs (
-      name: spec:
-        if builtins.hasAttr "outPath" spec
-        then abort
-          "The values in sources.json should not have an 'outPath' attribute"
-        else
-          spec // { outPath = replace name (fetch config.pkgs name spec); }
-    ) config.sources;
-
-  # The "config" used by the fetchers
-  mkConfig =
-    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
-    , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
-    , system ? builtins.currentSystem
-    , pkgs ? mkPkgs sources system
-    }: rec {
-      # The sources, i.e. the attribute set of spec name to spec
-      inherit sources;
-
-      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
-      inherit pkgs;
-    };
-
-in
-mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }