diff --git a/flake.lock b/flake.lock
index 9b948906..a207da7d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -853,22 +853,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-stable": {
-      "locked": {
-        "lastModified": 1696039360,
-        "narHash": "sha256-g7nIUV4uq1TOVeVIDEZLb005suTWCUjSY0zYOlSBsyE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "32dcb45f66c0487e92db8303a798ebc548cadedc",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1675758091,
@@ -1016,7 +1000,6 @@
         "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-stable": "nixpkgs-stable",
         "serokell-nix": "serokell-nix"
       }
     },
@@ -1111,6 +1094,21 @@
         "type": "github"
       }
     },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "tullia": {
       "inputs": {
         "nix-nomad": "nix-nomad",
@@ -1189,21 +1187,6 @@
         "repo": "yants",
         "type": "github"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 8e4dca6b..11fe0661 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,7 +8,6 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-23.05";
 
     flake-utils.url = "github:numtide/flake-utils";
 
@@ -22,7 +21,7 @@
     };
   };
 
-  outputs = { self, nixpkgs, nixpkgs-stable, flake-utils, serokell-nix, ... }:
+  outputs = { self, nixpkgs, flake-utils, serokell-nix, ... }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         overlay = self: super: {
@@ -38,26 +37,8 @@
           overlays = [ overlay serokell-nix.overlay ];
         };
 
-        pkgs-stable = import nixpkgs-stable {
-          inherit system;
-          overlays = [ overlay ];
-        };
-
         inherit (pkgs) haskell lib;
 
-        ghcjsPackages = pkgs-stable.haskell.packages.ghcjs810.override (old: {
-          overrides = (self: super: {
-            QuickCheck = haskell.lib.dontCheck super.QuickCheck;
-            tasty-quickcheck = haskell.lib.dontCheck super.tasty-quickcheck;
-            scientific = haskell.lib.dontCheck super.scientific;
-            temporary = haskell.lib.dontCheck super.temporary;
-            time-compat = haskell.lib.dontCheck super.time-compat;
-            text-short = haskell.lib.dontCheck super.text-short;
-            vector = haskell.lib.dontCheck super.vector;
-            aeson = super.aeson_1_5_6_0;
-          });
-        });
-
         regexes =
           [ ".*.cabal$" "^src.*" "^main.*" "^Setup.hs$" "^js.*" "LICENSE" ];
         src = builtins.path {
@@ -74,14 +55,6 @@
           nixfmt = pkgs.haskellPackages.nixfmt;
           nixfmt-static = haskell.lib.justStaticExecutables nixfmt;
           nixfmt-deriver = nixfmt-static.cabal2nixDeriver;
-          nixfmt-js = ghcjsPackages.callCabal2nix "nixfmt" src { };
-          nixfmt-webdemo = pkgs.runCommandNoCC "nixfmt-webdemo" { } ''
-            mkdir $out
-            cp ${./js/index.html} $out/index.html
-            cp ${./js/404.html} $out/404.html
-            cp ${nixfmt-js}/bin/js-interface.jsexe/{rts,lib,out,runmain}.js $out
-            substituteInPlace $out/index.html --replace ../dist/build/js-interface/js-interface.jsexe/ ./
-          '';
 
           nixfmt-shell = nixfmt.env.overrideAttrs (oldAttrs: {
             buildInputs = oldAttrs.buildInputs ++ (with pkgs; [
@@ -91,7 +64,7 @@
             ]);
           });
 
-          inherit (pkgs) awscli reuse;
+          inherit (pkgs) reuse;
         };
 
         apps.default = {
diff --git a/js/404.html b/js/404.html
deleted file mode 100644
index 31fab38e..00000000
--- a/js/404.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<!--
-© 2020 Serokell <hi@serokell.io>
-
-SPDX-License-Identifier: MPL-2.0
--->
-
-404 Page Not Found
diff --git a/js/JSInterface.hs b/js/JSInterface.hs
deleted file mode 100644
index dc1bb895..00000000
--- a/js/JSInterface.hs
+++ /dev/null
@@ -1,37 +0,0 @@
-{- © 2019 Serokell <hi@serokell.io>
- -
- - SPDX-License-Identifier: MPL-2.0
- -}
-
-{-# LANGUAGE OverloadedStrings #-}
-import GHCJS.Marshal
-import GHCJS.Foreign
-import GHCJS.Foreign.Callback
-import GHCJS.Types
-import JavaScript.Object
-import qualified JavaScript.Object.Internal as O
-import Data.JSString.Text
-import qualified Data.JSString as S
-
-import Nixfmt
-
-foreign import javascript unsafe "window.nixfmt_ = $1"
-    js_set_logic :: JSVal -> IO ()
-
-main :: IO ()
-main = do
-    callback <- syncCallback2 ThrowWouldBlock $ \text_ o -> do
-        let obj = O.Object o
-        Just width <- getProp (textToJSString "width") obj >>= fromJSVal
-        Just filename_ <- getProp (textToJSString "filename") obj >>= fromJSVal
-        let filename = S.unpack filename_
-        let text = textFromJSVal text_
-        out <- case format width filename text of
-          Left err -> do
-            setProp "err" (toJSBool True) obj
-            toJSVal $ S.pack err
-          Right out_ -> do
-            setProp "err" (toJSBool False) obj
-            toJSVal out_
-        setProp "ret" out obj
-    js_set_logic $ jsval callback
diff --git a/js/index.html b/js/index.html
deleted file mode 100644
index 4bcbf42c..00000000
--- a/js/index.html
+++ /dev/null
@@ -1,234 +0,0 @@
-<!DOCTYPE html>
-
-<!-- © 2019 Serokell <hi@serokell.io>
-   -
-   - SPDX-License-Identifier: MPL-2.0
-   -->
-
-<html>
-
-<head>
-  <title>nixfmt online demo</title>
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <script language="javascript" src="../dist/build/js-interface/js-interface.jsexe/rts.js"></script>
-  <script language="javascript" src="../dist/build/js-interface/js-interface.jsexe/lib.js"></script>
-  <script language="javascript" src="../dist/build/js-interface/js-interface.jsexe/out.js"></script>
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/styles/default.min.css">
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/highlight.min.js"></script>
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/languages/nix.min.js"></script>
-  <style>
-    html {
-      height: 100%;
-      padding: 0;
-      margin: 0;
-    }
-
-    body {
-      padding: 0;
-      margin: 0;
-      height: 100%;
-      display: flex;
-    }
-
-    * {
-      flex: 1;
-    }
-
-    #in {
-      resize: none;
-      flex: 1;
-    }
-
-    #fmt {
-      flex: 0;
-    }
-
-    #out {
-      resize: none;
-    }
-
-    #out-wrap {
-      resize: both;
-    }
-
-    pre {
-      overflow-y: scroll;
-      overflow-x: auto;
-      margin: 0;
-      resize: none;
-      white-space: pre-wrap;
-    }
-
-    code {
-      min-height: 100%;
-      min-width: 100%;
-    }
-
-    .gh-ribbon {
-      position: absolute;
-      top: 0;
-      right: 0;
-      display: inline-block;
-      -moz-user-select: none;
-      -webkit-user-select: none;
-      user-select: none;
-    }
-
-    @media only screen and (max-width: 80em) {
-      body {
-        flex-direction: column;
-      }
-    }
-
-    @media only screen and (min-width: 80em) {
-      body {
-        flex-direction: row;
-      }
-    }
-
-    button {
-      word-wrap: break-word;
-      flex: 0;
-    }
-
-    #probe {
-      visibility: hidden;
-      position: absolute;
-      width: auto;
-      height: auto;
-      margin: 0;
-      padding: 0;
-      overflow: hidden;
-    }
-  </style>
-</head>
-
-<body>
-  <script language="javascript" src="../dist/build/js-interface/js-interface.jsexe/runmain.js" defer></script>
-  <textarea id="in" cols=80 spellcheck="false">
-let
-/*
- * What you're seeing here is our nix formatter. It's quite opinionated:
- */
-  sample-01 = { lib }:
-{
-  list = [
-    elem1
-    elem2
-    elem3
-  ] ++ lib.optionals stdenv.isDarwin [
-    elem4
-    elem5
-  ]; # and not quite finished
-}; # it will preserve your newlines
-
-  sample-02 = { stdenv, lib }:
-{
-  list =
-    [
-      elem1
-      elem2
-      elem3
-    ]
-    ++ lib.optionals stdenv.isDarwin [ elem4 elem5 ]
-    ++ lib.optionals stdenv.isLinux [ elem6 ]
-    ;
-};
-# but it can handle all nix syntax,
-# and, in fact, all of nixpkgs in <20s.
-# The javascript build is quite a bit slower.
- sample-03 = { stdenv, system }:
-assert system == "i686-linux";
-stdenv.mkDerivation { };
-# these samples are all from https://github.com/nix-community/nix-fmt/tree/master/samples
-sample-simple = # Some basic formatting
-{
-  empty_list = [ ];
-  inline_list = [ 1 2 3 ];
-  multiline_list = [
-    1
-    2
-    3
-    4
-  ];
-  inline_attrset = { x = "y"; };
-  multiline_attrset = {
-    a = 3;
-    b = 5;
-  };
-  # some comment over here
-  fn = x: x + x;
-  relpath = ./hello;
-  abspath = /hello;
-  # URLs get converted from strings
-  url = "https://foobar.com";
-  atoms = [ true false null ];
-  # Combined
-  listOfAttrs = [
-    {
-      attr1 = 3;
-      attr2 = "fff";
-    }
-    {
-      attr1 = 5;
-      attr2 = "ggg";
-    }
-  ];
-
-  # long expression
-  attrs = {
-    attr1 = short_expr;
-    attr2 =
-      if true then big_expr else big_expr;
-  };
-}
-;
-in
-[ sample-01 sample-02 sample-03 ]
-  </textarea>
-  <button id="fmt">Format!</button>
-  <pre id="out-wrap"><code class="hljs lang-nix" id="out"># nixfmt loading</code></pre>
-  <pre id="probe">xxx</pre>
-  <script>
-    hljs.configure({ languages: ["nix"] })
-    function nixfmt(text, width = 80, filename = "<stdin>") {
-      const param = { width, filename }
-      nixfmt_(text, param)
-      return { text: param.ret, err: param.err }
-    }
-
-    function format() {
-      if (!window.nixfmt_) {
-        return setTimeout(format, 100)
-      }
-      const outWrap = document.getElementById("out-wrap")
-      let width = 80;
-      if (outWrap.style.width) {
-        const fontwidth = (document.getElementById("probe").clientWidth + 1) / 3
-        width = parseFloat(outWrap.style.width) / fontwidth
-      }
-      const outText = nixfmt(document.getElementById('in').value, width).text
-      const out = document.getElementById('out')
-      out.textContent = outText
-      hljs.highlightBlock(out)
-    }
-    document.getElementById('fmt').addEventListener('click', format)
-    window.onload = format
-    let resizeTimer = false
-    const resizeObserver = new MutationObserver(entries => {
-      if (resizeTimer) {
-        clearTimeout(resizeTimer)
-        resizeTimer = false
-      }
-      resizeTimer = setTimeout(format, 500)
-    });
-    resizeObserver.observe(document.getElementById('out-wrap'), {
-      attributes: true, attributeFilter: ["style"]
-    });
-  </script>
-  <a href="https://github.com/serokell/nixfmt" class="gh-ribbon"><img width="149" height="149"
-      src="https://github.blog/wp-content/uploads/2008/12/forkme_right_darkblue_121621.png?resize=149%2C149"
-      class="attachment-full size-full" alt="Fork me on GitHub" data-recalc-dims="1"></a>
-</body>
-
-</html>
diff --git a/nixfmt.cabal b/nixfmt.cabal
index 832b28e3..61016937 100644
--- a/nixfmt.cabal
+++ b/nixfmt.cabal
@@ -36,10 +36,6 @@ executable nixfmt
     Paths_nixfmt
   other-extensions:    DeriveDataTypeable
   hs-source-dirs:      main
-  if impl(ghcjs)
-    buildable: False
-  else
-    buildable: True
   build-depends:
       base             >= 4.12.0 && < 4.19
     , cmdargs          >= 0.10.20 && < 0.11
@@ -99,25 +95,3 @@ library
     -Wincomplete-uni-patterns
     -Wredundant-constraints
     -Wno-orphans
-
-executable js-interface
-  main-is: JSInterface.hs
-
-  if impl(ghcjs)
-    buildable: True
-    ghc-options:
-      -Wall
-      -Wcompat
-      -Wincomplete-record-updates
-      -Wincomplete-uni-patterns
-      -Wredundant-constraints
-      -Wno-orphans
-    build-depends:
-      base             >= 4.12.0 && < 4.19
-      , ghcjs-base     >= 0.2.0 && < 0.3
-      , nixfmt
-    hs-source-dirs:    js/
-  else
-    buildable: False
-
-  default-language: Haskell2010