diff --git a/pkgs/development/tools/yarn2nix/bin/yarn2nix.js b/pkgs/development/tools/yarn2nix/bin/yarn2nix.js
deleted file mode 100755
index 3eadea559032f..0000000000000
--- a/pkgs/development/tools/yarn2nix/bin/yarn2nix.js
+++ /dev/null
@@ -1,144 +0,0 @@
-#!/usr/bin/env node
-"use strict";
-
-const crypto = require('crypto');
-const fs = require("fs");
-const https = require("https");
-const path = require("path");
-const util = require("util");
-
-const lockfile = require("@yarnpkg/lockfile")
-const docopt = require("docopt").docopt;
-
-////////////////////////////////////////////////////////////////////////////////
-
-const USAGE = `
-Usage: yarn2nix [options]
-
-Options:
-  -h --help        Shows this help.
-  --no-nix         Hide the nix output
-  --no-patch       Don't patch the lockfile if hashes are missing
-  --lockfile=FILE  Specify path to the lockfile [default: ./yarn.lock].
-`
-
-const HEAD = `
-{fetchurl, linkFarm}: rec {
-  offline_cache = linkFarm "offline" packages;
-  packages = [
-`.trim();
-
-////////////////////////////////////////////////////////////////////////////////
-
-function generateNix(lockedDependencies) {
-  let found = {};
-
-  console.log(HEAD)
-
-  for (var depRange in lockedDependencies) {
-    let dep = lockedDependencies[depRange];
-
-    let depRangeParts = depRange.split('@');
-    let [url, sha1] = dep["resolved"].split("#");
-    let file_name = path.basename(url)
-
-    if (found.hasOwnProperty(file_name)) {
-      continue;
-    } else {
-      found[file_name] = null;
-    }
-
-
-    console.log(`
-    {
-      name = "${file_name}";
-      path = fetchurl {
-        name = "${file_name}";
-        url  = "${url}";
-        sha1 = "${sha1}";
-      };
-    }`)
-  }
-
-  console.log("  ];")
-  console.log("}")
-}
-
-
-function getSha1(url) {
-  return new Promise((resolve, reject) => {
-    https.get(url, (res) => {
-      const { statusCode } = res;
-      const hash = crypto.createHash('sha1');
-      if (statusCode !== 200) {
-        const err = new Error('Request Failed.\n' +
-                          `Status Code: ${statusCode}`);
-        // consume response data to free up memory
-        res.resume();
-        reject(err);
-      }
-
-      res.on('data', (chunk) => { hash.update(chunk); });
-      res.on('end', () => { resolve(hash.digest('hex')) });
-      res.on('error', reject);
-    });
-  });
-};
-
-function updateResolvedSha1(pkg) {
-  // local dependency
-  if (!pkg.resolved) { return Promise.resolve(); }
-  let [url, sha1] = pkg.resolved.split("#", 2)
-  if (!sha1) {
-    return new Promise((resolve, reject) => {
-      getSha1(url).then(sha1 => {
-        pkg.resolved = `${url}#${sha1}`;
-        resolve();
-      }).catch(reject);
-    });
-  } else {
-    // nothing to do
-    return Promise.resolve();
-  };
-}
-
-function values(obj) {
-  var entries = [];
-  for (let key in obj) {
-    entries.push(obj[key]);
-  }
-  return entries;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Main
-////////////////////////////////////////////////////////////////////////////////
-
-var options = docopt(USAGE);
-
-let data = fs.readFileSync(options['--lockfile'], 'utf8')
-let json = lockfile.parse(data)
-if (json.type != "success") {
-  throw new Error("yarn.lock parse error")
-}
-
-// Check fore missing hashes in the yarn.lock and patch if necessary
-var pkgs = values(json.object);
-Promise.all(pkgs.map(updateResolvedSha1)).then(() => {
-  let newData = lockfile.stringify(json.object);
-
-  if (newData != data) {
-    console.error("found changes in the lockfile", options["--lockfile"]);
-
-    if (options["--no-patch"]) {
-      console.error("...aborting");
-      process.exit(1);
-    }
-
-    fs.writeFileSync(options['--lockfile'], newData);
-  }
-
-  if (!options['--no-nix']) {
-    generateNix(json.object);
-  }
-})
diff --git a/pkgs/development/tools/yarn2nix/default.nix b/pkgs/development/tools/yarn2nix/default.nix
deleted file mode 100644
index e86c0aac2c994..0000000000000
--- a/pkgs/development/tools/yarn2nix/default.nix
+++ /dev/null
@@ -1,199 +0,0 @@
-{ stdenv, lib, fetchurl, linkFarm, runCommand, nodejs, yarn }:
-
-let
-  unlessNull = item: alt:
-    if item == null then alt else item;
-
-  yarn2nix = mkYarnPackage {
-    src = ./.;
-    yarnNix = ./yarn.nix;
-
-    passthru = {
-      inherit
-        defaultYarnFlags
-        linkNodeModulesHook
-        mkYarnModules
-        mkYarnNix
-        mkYarnPackage
-        # Export yarn again to make it easier to find out which yarn was used.
-        yarn
-        ;
-    };
-
-    meta = with lib; {
-      description = "generate nix expressions from a yarn.lock file";
-      homepage = "https://github.com/moretea/yarn2nix";
-      license = licenses.gpl3;
-      maintainers = with maintainers; [ manveru zimbatm ];
-    };
-  };
-
-  # Generates the yarn.nix from the yarn.lock file
-  mkYarnNix = yarnLock:
-    runCommand "yarn.nix" {}
-      "${yarn2nix}/bin/yarn2nix --lockfile ${yarnLock} --no-patch > $out";
-
-  # Loads the generated offline cache. This will be used by yarn as
-  # the package source.
-  importOfflineCache = yarnNix:
-    let
-      pkg = import yarnNix { inherit fetchurl linkFarm; };
-    in
-      pkg.offline_cache;
-
-  defaultYarnFlags = [
-    "--offline"
-    "--frozen-lockfile"
-    "--ignore-engines"
-    "--ignore-scripts"
-  ];
-
-  mkYarnModules = {
-    name,
-    packageJSON,
-    yarnLock,
-    yarnNix ? mkYarnNix yarnLock,
-    yarnFlags ? defaultYarnFlags,
-    pkgConfig ? {},
-    preBuild ? "",
-  }:
-    let
-      offlineCache = importOfflineCache yarnNix;
-      extraBuildInputs = (lib.flatten (builtins.map (key:
-        pkgConfig.${key} . buildInputs or []
-      ) (builtins.attrNames pkgConfig)));
-      postInstall = (builtins.map (key:
-        if (pkgConfig.${key} ? postInstall) then
-          ''
-            for f in $(find -L -path '*/node_modules/${key}' -type d); do
-              (cd "$f" && (${pkgConfig.${key}.postInstall}))
-            done
-          ''
-        else
-          ""
-      ) (builtins.attrNames pkgConfig));
-    in
-    stdenv.mkDerivation {
-      inherit name preBuild;
-      phases = ["configurePhase" "buildPhase"];
-      buildInputs = [ yarn nodejs ] ++ extraBuildInputs;
-
-      configurePhase = ''
-        # Yarn writes cache directories etc to $HOME.
-        export HOME=$PWD/yarn_home
-      '';
-
-      buildPhase = ''
-        runHook preBuild
-
-        cp ${packageJSON} ./package.json
-        cp ${yarnLock} ./yarn.lock
-        chmod +w ./yarn.lock
-
-        yarn config --offline set yarn-offline-mirror ${offlineCache}
-
-        # Do not look up in the registry, but in the offline cache.
-        # TODO: Ask upstream to fix this mess.
-        sed -i -E 's|^(\s*resolved\s*")https?://.*/|\1|' yarn.lock
-        yarn install ${lib.escapeShellArgs yarnFlags}
-
-        ${lib.concatStringsSep "\n" postInstall}
-
-        mkdir $out
-        mv node_modules $out/
-        patchShebangs $out
-      '';
-    };
-
-  # This can be used as a shellHook in mkYarnPackage. It brings the built node_modules into
-  # the shell-hook environment.
-  linkNodeModulesHook = ''
-    if [[ -d node_modules || -L node_modules ]]; then
-      echo "./node_modules is present. Replacing."
-      rm -rf node_modules
-    fi
-
-    ln -s "$node_modules" node_modules
-  '';
-
-  mkYarnPackage = {
-    name ? null,
-    src,
-    packageJSON ? src + "/package.json",
-    yarnLock ? src + "/yarn.lock",
-    yarnNix ? mkYarnNix yarnLock,
-    yarnFlags ? defaultYarnFlags,
-    yarnPreBuild ? "",
-    pkgConfig ? {},
-    extraBuildInputs ? [],
-    publishBinsFor ? null,
-    ...
-  }@attrs:
-    let
-      package = lib.importJSON packageJSON;
-      pname = package.name;
-      version = package.version;
-      deps = mkYarnModules {
-        name = "${pname}-modules-${version}";
-        preBuild = yarnPreBuild;
-        inherit packageJSON yarnLock yarnNix yarnFlags pkgConfig;
-      };
-      publishBinsFor_ = unlessNull publishBinsFor [pname];
-    in stdenv.mkDerivation (builtins.removeAttrs attrs ["pkgConfig"] // {
-      inherit src;
-
-      name = unlessNull name "${pname}-${version}";
-
-      buildInputs = [ yarn nodejs ] ++ extraBuildInputs;
-
-      node_modules = deps + "/node_modules";
-
-      configurePhase = attrs.configurePhase or ''
-        runHook preConfigure
-
-        if [ -d npm-packages-offline-cache ]; then
-          echo "npm-pacakges-offline-cache dir present. Removing."
-          rm -rf npm-packages-offline-cache
-        fi
-
-        if [[ -d node_modules || -L node_modules ]]; then
-          echo "./node_modules is present. Removing."
-          rm -rf node_modules
-        fi
-
-        mkdir -p node_modules
-        ln -s $node_modules/* node_modules/
-        ln -s $node_modules/.bin node_modules/
-
-        if [ -d node_modules/${pname} ]; then
-          echo "Error! There is already an ${pname} package in the top level node_modules dir!"
-          exit 1
-        fi
-
-        runHook postConfigure
-      '';
-
-      # Replace this phase on frontend packages where only the generated
-      # files are an interesting output.
-      installPhase = attrs.installPhase or ''
-        runHook preInstall
-
-        mkdir -p $out
-        cp -r node_modules $out/node_modules
-        cp -r . $out/node_modules/${pname}
-        rm -rf $out/node_modules/${pname}/node_modules
-
-        mkdir $out/bin
-        node ${./fixup_bin.js} $out ${lib.concatStringsSep " " publishBinsFor_}
-
-        runHook postInstall
-      '';
-
-      passthru = {
-        inherit package deps;
-      } // (attrs.passthru or {});
-
-      # TODO: populate meta automatically
-    });
-in
-  yarn2nix
diff --git a/pkgs/development/tools/yarn2nix/fixup_bin.js b/pkgs/development/tools/yarn2nix/fixup_bin.js
deleted file mode 100644
index dab1759c2046b..0000000000000
--- a/pkgs/development/tools/yarn2nix/fixup_bin.js
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/usr/bin/env node
-"use strict";
-
-/* Usage:
- * node fixup_bin.js <output_dir> [<bin_pkg_1>, <bin_pkg_2> ... ]
- */
-
-const fs = require("fs");
-const path = require("path");
-
-const output = process.argv[2];
-const packages_to_publish_bin = process.argv.slice(3);
-const derivation_bin_path = output + "/bin";
-
-function processPackage(name) {
-  console.log("Processing ", name);
-  const package_path = output + "/node_modules/" + name;
-  const package_json_path = package_path + "/package.json";
-  const package_json = JSON.parse(fs.readFileSync(package_json_path));
-
-  if (!package_json.bin) {
-    console.log("No binaries provided");
-    return;
-  }
-
-  // There are two alternative syntaxes for `bin`
-  // a) just a plain string, in which case the name of the package is the name of the binary.
-  // b) an object, where key is the name of the eventual binary, and the value the path to that binary.
-  if (typeof package_json.bin == "string") {
-    let bin_name = package_json.bin;
-    package_json.bin = { };
-    package_json.bin[package_json.name] = bin_name;
-  }
-
-  for (let binName in package_json.bin) {
-    const bin_path = package_json.bin[binName];
-    const full_bin_path = path.normalize(package_path + "/" + bin_path);
-    fs.symlinkSync(full_bin_path, derivation_bin_path + "/"+ binName);
-    console.log("Linked", binName);
-  }
-}
-
-packages_to_publish_bin.forEach((pkg) => {
-  processPackage(pkg);
-});
diff --git a/pkgs/development/tools/yarn2nix/package.json b/pkgs/development/tools/yarn2nix/package.json
deleted file mode 100644
index 130eee67c5606..0000000000000
--- a/pkgs/development/tools/yarn2nix/package.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "name": "yarn2nix",
-  "version": "1.0.0",
-  "description": "Convert packages.json and yarn.lock into a Nix expression that downloads all the dependencies",
-  "main": "index.js",
-  "repository": ".",
-  "author": "Maarten Hoogendoorn <maarten@moretea.nl>",
-  "license": "MIT",
-  "scripts": {
-    "yarn2nix": "bin/yarn2nix.js"
-  },
-  "bin": {
-    "yarn2nix": "bin/yarn2nix.js"
-  },
-  "dependencies": {
-    "@yarnpkg/lockfile": "^1.0.0",
-    "docopt": "^0.6.2"
-  }
-}
diff --git a/pkgs/development/tools/yarn2nix/yarn.lock b/pkgs/development/tools/yarn2nix/yarn.lock
deleted file mode 100644
index 976d2c530e1e7..0000000000000
--- a/pkgs/development/tools/yarn2nix/yarn.lock
+++ /dev/null
@@ -1,11 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-"@yarnpkg/lockfile@^1.0.0":
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/@yarnpkg/lockfile/-/lockfile-1.0.0.tgz#33d1dbb659a23b81f87f048762b35a446172add3"
-
-docopt@^0.6.2:
-  version "0.6.2"
-  resolved "https://registry.yarnpkg.com/docopt/-/docopt-0.6.2.tgz#b28e9e2220da5ec49f7ea5bb24a47787405eeb11"
\ No newline at end of file
diff --git a/pkgs/development/tools/yarn2nix/yarn.nix b/pkgs/development/tools/yarn2nix/yarn.nix
deleted file mode 100644
index a9e42e7d986c5..0000000000000
--- a/pkgs/development/tools/yarn2nix/yarn.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{fetchurl, linkFarm}: rec {
-  offline_cache = linkFarm "offline" packages;
-  packages = [
-
-    {
-      name = "lockfile-1.0.0.tgz";
-      path = fetchurl {
-        name = "lockfile-1.0.0.tgz";
-        url  = "https://registry.yarnpkg.com/@yarnpkg/lockfile/-/lockfile-1.0.0.tgz";
-        sha1 = "33d1dbb659a23b81f87f048762b35a446172add3";
-      };
-    }
-
-    {
-      name = "docopt-0.6.2.tgz";
-      path = fetchurl {
-        name = "docopt-0.6.2.tgz";
-        url  = "https://registry.yarnpkg.com/docopt/-/docopt-0.6.2.tgz";
-        sha1 = "b28e9e2220da5ec49f7ea5bb24a47787405eeb11";
-      };
-    }
-  ];
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 90daabcf890f8..90796f8718254 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6513,9 +6513,9 @@ in
   yaft = callPackage ../applications/misc/yaft { };
 
   yarn = callPackage ../development/tools/yarn  { };
-
-  yarn2nix = callPackage ../development/tools/yarn2nix { };
-  inherit (yarn2nix) mkYarnPackage;
+  
+  yarn2nix = throw "Use upstream https://github.com/moretea/yarn2nix";
+  mkYarnPackage = yarn2nix;
 
   yasr = callPackage ../applications/audio/yasr { };