diff --git a/pkgs/applications/networking/instant-messengers/riot/riot-desktop-package.json b/pkgs/applications/networking/instant-messengers/riot/riot-desktop-package.json
new file mode 100644
index 00000000000000..cb3c9092374752
--- /dev/null
+++ b/pkgs/applications/networking/instant-messengers/riot/riot-desktop-package.json
@@ -0,0 +1,15 @@
+{
+  "name": "riot-web",
+  "productName": "Riot",
+  "main": "src/electron-main.js",
+  "version": "1.0.4",
+  "description": "A feature-rich client for Matrix.org",
+  "author": "New Vector Ltd.",
+  "dependencies": {
+    "auto-launch": "^5.0.1",
+    "electron-store": "^2.0.0",
+    "electron-window-state": "^4.1.0",
+    "minimist": "^1.2.0",
+    "png-to-ico": "^1.0.2"
+  }
+}
diff --git a/pkgs/applications/networking/instant-messengers/riot/riot-desktop-yarndeps.nix b/pkgs/applications/networking/instant-messengers/riot/riot-desktop-yarndeps.nix
new file mode 100644
index 00000000000000..25cc694afcfd07
--- /dev/null
+++ b/pkgs/applications/networking/instant-messengers/riot/riot-desktop-yarndeps.nix
@@ -0,0 +1,1148 @@
+{fetchurl, linkFarm}: rec {
+  offline_cache = linkFarm "offline" packages;
+  packages = [
+
+    {
+      name = "node-9.6.45.tgz";
+      path = fetchurl {
+        name = "node-9.6.45.tgz";
+        url  = "https://registry.yarnpkg.com/@types/node/-/node-9.6.45.tgz";
+        sha1 = "a9e5cfd026a3abaaf17e3c0318a470da9f2f178e";
+      };
+    }
+
+    {
+      name = "ajv-6.10.0.tgz";
+      path = fetchurl {
+        name = "ajv-6.10.0.tgz";
+        url  = "https://registry.yarnpkg.com/ajv/-/ajv-6.10.0.tgz";
+        sha1 = "90d0d54439da587cd7e843bfb7045f50bd22bdf1";
+      };
+    }
+
+    {
+      name = "applescript-1.0.0.tgz";
+      path = fetchurl {
+        name = "applescript-1.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/applescript/-/applescript-1.0.0.tgz";
+        sha1 = "bb87af568cad034a4e48c4bdaf6067a3a2701317";
+      };
+    }
+
+    {
+      name = "asn1-0.2.4.tgz";
+      path = fetchurl {
+        name = "asn1-0.2.4.tgz";
+        url  = "https://registry.yarnpkg.com/asn1/-/asn1-0.2.4.tgz";
+        sha1 = "8d2475dfab553bb33e77b54e59e880bb8ce23136";
+      };
+    }
+
+    {
+      name = "assert-plus-1.0.0.tgz";
+      path = fetchurl {
+        name = "assert-plus-1.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/assert-plus/-/assert-plus-1.0.0.tgz";
+        sha1 = "f12e0f3c5d77b0b1cdd9146942e4e96c1e4dd525";
+      };
+    }
+
+    {
+      name = "asynckit-0.4.0.tgz";
+      path = fetchurl {
+        name = "asynckit-0.4.0.tgz";
+        url  = "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz";
+        sha1 = "c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79";
+      };
+    }
+
+    {
+      name = "auto-launch-5.0.5.tgz";
+      path = fetchurl {
+        name = "auto-launch-5.0.5.tgz";
+        url  = "https://registry.yarnpkg.com/auto-launch/-/auto-launch-5.0.5.tgz";
+        sha1 = "d14bd002b1ef642f85e991a6195ff5300c8ad3c0";
+      };
+    }
+
+    {
+      name = "aws-sign2-0.7.0.tgz";
+      path = fetchurl {
+        name = "aws-sign2-0.7.0.tgz";
+        url  = "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.7.0.tgz";
+        sha1 = "b46e890934a9591f2d2f6f86d7e6a9f1b3fe76a8";
+      };
+    }
+
+    {
+      name = "aws4-1.8.0.tgz";
+      path = fetchurl {
+        name = "aws4-1.8.0.tgz";
+        url  = "https://registry.yarnpkg.com/aws4/-/aws4-1.8.0.tgz";
+        sha1 = "f0e003d9ca9e7f59c7a508945d7b2ef9a04a542f";
+      };
+    }
+
+    {
+      name = "bcrypt-pbkdf-1.0.2.tgz";
+      path = fetchurl {
+        name = "bcrypt-pbkdf-1.0.2.tgz";
+        url  = "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz";
+        sha1 = "a4301d389b6a43f9b67ff3ca11a3f6637e360e9e";
+      };
+    }
+
+    {
+      name = "bignumber.js-2.4.0.tgz";
+      path = fetchurl {
+        name = "bignumber.js-2.4.0.tgz";
+        url  = "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-2.4.0.tgz";
+        sha1 = "838a992da9f9d737e0f4b2db0be62bb09dd0c5e8";
+      };
+    }
+
+    {
+      name = "bmp-js-0.0.3.tgz";
+      path = fetchurl {
+        name = "bmp-js-0.0.3.tgz";
+        url  = "https://registry.yarnpkg.com/bmp-js/-/bmp-js-0.0.3.tgz";
+        sha1 = "64113e9c7cf1202b376ed607bf30626ebe57b18a";
+      };
+    }
+
+    {
+      name = "buffer-equal-0.0.1.tgz";
+      path = fetchurl {
+        name = "buffer-equal-0.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/buffer-equal/-/buffer-equal-0.0.1.tgz";
+        sha1 = "91bc74b11ea405bc916bc6aa908faafa5b4aac4b";
+      };
+    }
+
+    {
+      name = "caseless-0.12.0.tgz";
+      path = fetchurl {
+        name = "caseless-0.12.0.tgz";
+        url  = "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz";
+        sha1 = "1b681c21ff84033c826543090689420d187151dc";
+      };
+    }
+
+    {
+      name = "combined-stream-1.0.7.tgz";
+      path = fetchurl {
+        name = "combined-stream-1.0.7.tgz";
+        url  = "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.7.tgz";
+        sha1 = "2d1d24317afb8abe95d6d2c0b07b57813539d828";
+      };
+    }
+
+    {
+      name = "conf-2.2.0.tgz";
+      path = fetchurl {
+        name = "conf-2.2.0.tgz";
+        url  = "https://registry.yarnpkg.com/conf/-/conf-2.2.0.tgz";
+        sha1 = "ee282efafc1450b61e205372041ad7d866802d9a";
+      };
+    }
+
+    {
+      name = "core-util-is-1.0.2.tgz";
+      path = fetchurl {
+        name = "core-util-is-1.0.2.tgz";
+        url  = "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz";
+        sha1 = "b5fd54220aa2bc5ab57aab7140c940754503c1a7";
+      };
+    }
+
+    {
+      name = "dashdash-1.14.1.tgz";
+      path = fetchurl {
+        name = "dashdash-1.14.1.tgz";
+        url  = "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz";
+        sha1 = "853cfa0f7cbe2fed5de20326b8dd581035f6e2f0";
+      };
+    }
+
+    {
+      name = "deep-equal-1.0.1.tgz";
+      path = fetchurl {
+        name = "deep-equal-1.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz";
+        sha1 = "f5d260292b660e084eff4cdbc9f08ad3247448b5";
+      };
+    }
+
+    {
+      name = "define-properties-1.1.3.tgz";
+      path = fetchurl {
+        name = "define-properties-1.1.3.tgz";
+        url  = "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz";
+        sha1 = "cf88da6cbee26fe6db7094f61d870cbd84cee9f1";
+      };
+    }
+
+    {
+      name = "delayed-stream-1.0.0.tgz";
+      path = fetchurl {
+        name = "delayed-stream-1.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz";
+        sha1 = "df3ae199acadfb7d440aaae0b29e2272b24ec619";
+      };
+    }
+
+    {
+      name = "dom-walk-0.1.1.tgz";
+      path = fetchurl {
+        name = "dom-walk-0.1.1.tgz";
+        url  = "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.1.tgz";
+        sha1 = "672226dc74c8f799ad35307df936aba11acd6018";
+      };
+    }
+
+    {
+      name = "dot-prop-4.2.0.tgz";
+      path = fetchurl {
+        name = "dot-prop-4.2.0.tgz";
+        url  = "https://registry.yarnpkg.com/dot-prop/-/dot-prop-4.2.0.tgz";
+        sha1 = "1f19e0c2e1aa0e32797c49799f2837ac6af69c57";
+      };
+    }
+
+    {
+      name = "ecc-jsbn-0.1.2.tgz";
+      path = fetchurl {
+        name = "ecc-jsbn-0.1.2.tgz";
+        url  = "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz";
+        sha1 = "3a83a904e54353287874c564b7549386849a98c9";
+      };
+    }
+
+    {
+      name = "electron-store-2.0.0.tgz";
+      path = fetchurl {
+        name = "electron-store-2.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/electron-store/-/electron-store-2.0.0.tgz";
+        sha1 = "1035cca2a95409d1f54c7466606345852450d64a";
+      };
+    }
+
+    {
+      name = "electron-window-state-4.1.1.tgz";
+      path = fetchurl {
+        name = "electron-window-state-4.1.1.tgz";
+        url  = "https://registry.yarnpkg.com/electron-window-state/-/electron-window-state-4.1.1.tgz";
+        sha1 = "6b34fdc31b38514dfec8b7c8f7b5d4addb67632d";
+      };
+    }
+
+    {
+      name = "env-paths-1.0.0.tgz";
+      path = fetchurl {
+        name = "env-paths-1.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/env-paths/-/env-paths-1.0.0.tgz";
+        sha1 = "4168133b42bb05c38a35b1ae4397c8298ab369e0";
+      };
+    }
+
+    {
+      name = "es-abstract-1.13.0.tgz";
+      path = fetchurl {
+        name = "es-abstract-1.13.0.tgz";
+        url  = "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.13.0.tgz";
+        sha1 = "ac86145fdd5099d8dd49558ccba2eaf9b88e24e9";
+      };
+    }
+
+    {
+      name = "es-to-primitive-1.2.0.tgz";
+      path = fetchurl {
+        name = "es-to-primitive-1.2.0.tgz";
+        url  = "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.2.0.tgz";
+        sha1 = "edf72478033456e8dda8ef09e00ad9650707f377";
+      };
+    }
+
+    {
+      name = "es6-promise-3.3.1.tgz";
+      path = fetchurl {
+        name = "es6-promise-3.3.1.tgz";
+        url  = "https://registry.yarnpkg.com/es6-promise/-/es6-promise-3.3.1.tgz";
+        sha1 = "a08cdde84ccdbf34d027a1451bc91d4bcd28a613";
+      };
+    }
+
+    {
+      name = "exif-parser-0.1.12.tgz";
+      path = fetchurl {
+        name = "exif-parser-0.1.12.tgz";
+        url  = "https://registry.yarnpkg.com/exif-parser/-/exif-parser-0.1.12.tgz";
+        sha1 = "58a9d2d72c02c1f6f02a0ef4a9166272b7760922";
+      };
+    }
+
+    {
+      name = "extend-3.0.2.tgz";
+      path = fetchurl {
+        name = "extend-3.0.2.tgz";
+        url  = "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz";
+        sha1 = "f8b1136b4071fbd8eb140aff858b1019ec2915fa";
+      };
+    }
+
+    {
+      name = "extsprintf-1.3.0.tgz";
+      path = fetchurl {
+        name = "extsprintf-1.3.0.tgz";
+        url  = "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.3.0.tgz";
+        sha1 = "96918440e3041a7a414f8c52e3c574eb3c3e1e05";
+      };
+    }
+
+    {
+      name = "extsprintf-1.4.0.tgz";
+      path = fetchurl {
+        name = "extsprintf-1.4.0.tgz";
+        url  = "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz";
+        sha1 = "e2689f8f356fad62cca65a3a91c5df5f9551692f";
+      };
+    }
+
+    {
+      name = "fast-deep-equal-2.0.1.tgz";
+      path = fetchurl {
+        name = "fast-deep-equal-2.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz";
+        sha1 = "7b05218ddf9667bf7f370bf7fdb2cb15fdd0aa49";
+      };
+    }
+
+    {
+      name = "fast-json-stable-stringify-2.0.0.tgz";
+      path = fetchurl {
+        name = "fast-json-stable-stringify-2.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz";
+        sha1 = "d5142c0caee6b1189f87d3a76111064f86c8bbf2";
+      };
+    }
+
+    {
+      name = "file-type-3.9.0.tgz";
+      path = fetchurl {
+        name = "file-type-3.9.0.tgz";
+        url  = "https://registry.yarnpkg.com/file-type/-/file-type-3.9.0.tgz";
+        sha1 = "257a078384d1db8087bc449d107d52a52672b9e9";
+      };
+    }
+
+    {
+      name = "find-up-2.1.0.tgz";
+      path = fetchurl {
+        name = "find-up-2.1.0.tgz";
+        url  = "https://registry.yarnpkg.com/find-up/-/find-up-2.1.0.tgz";
+        sha1 = "45d1b7e506c717ddd482775a2b77920a3c0c57a7";
+      };
+    }
+
+    {
+      name = "for-each-0.3.3.tgz";
+      path = fetchurl {
+        name = "for-each-0.3.3.tgz";
+        url  = "https://registry.yarnpkg.com/for-each/-/for-each-0.3.3.tgz";
+        sha1 = "69b447e88a0a5d32c3e7084f3f1710034b21376e";
+      };
+    }
+
+    {
+      name = "forever-agent-0.6.1.tgz";
+      path = fetchurl {
+        name = "forever-agent-0.6.1.tgz";
+        url  = "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz";
+        sha1 = "fbc71f0c41adeb37f96c577ad1ed42d8fdacca91";
+      };
+    }
+
+    {
+      name = "form-data-2.3.3.tgz";
+      path = fetchurl {
+        name = "form-data-2.3.3.tgz";
+        url  = "https://registry.yarnpkg.com/form-data/-/form-data-2.3.3.tgz";
+        sha1 = "dcce52c05f644f298c6a7ab936bd724ceffbf3a6";
+      };
+    }
+
+    {
+      name = "function-bind-1.1.1.tgz";
+      path = fetchurl {
+        name = "function-bind-1.1.1.tgz";
+        url  = "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz";
+        sha1 = "a56899d3ea3c9bab874bb9773b7c5ede92f4895d";
+      };
+    }
+
+    {
+      name = "getpass-0.1.7.tgz";
+      path = fetchurl {
+        name = "getpass-0.1.7.tgz";
+        url  = "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz";
+        sha1 = "5eff8e3e684d569ae4cb2b1282604e8ba62149fa";
+      };
+    }
+
+    {
+      name = "global-4.3.2.tgz";
+      path = fetchurl {
+        name = "global-4.3.2.tgz";
+        url  = "https://registry.yarnpkg.com/global/-/global-4.3.2.tgz";
+        sha1 = "e76989268a6c74c38908b1305b10fc0e394e9d0f";
+      };
+    }
+
+    {
+      name = "graceful-fs-4.1.15.tgz";
+      path = fetchurl {
+        name = "graceful-fs-4.1.15.tgz";
+        url  = "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz";
+        sha1 = "ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00";
+      };
+    }
+
+    {
+      name = "har-schema-2.0.0.tgz";
+      path = fetchurl {
+        name = "har-schema-2.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz";
+        sha1 = "a94c2224ebcac04782a0d9035521f24735b7ec92";
+      };
+    }
+
+    {
+      name = "har-validator-5.1.3.tgz";
+      path = fetchurl {
+        name = "har-validator-5.1.3.tgz";
+        url  = "https://registry.yarnpkg.com/har-validator/-/har-validator-5.1.3.tgz";
+        sha1 = "1ef89ebd3e4996557675eed9893110dc350fa080";
+      };
+    }
+
+    {
+      name = "has-symbols-1.0.0.tgz";
+      path = fetchurl {
+        name = "has-symbols-1.0.0.tgz";
+        url  = "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.0.tgz";
+        sha1 = "ba1a8f1af2a0fc39650f5c850367704122063b44";
+      };
+    }
+
+    {
+      name = "has-1.0.3.tgz";
+      path = fetchurl {
+        name = "has-1.0.3.tgz";
+        url  = "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz";
+        sha1 = "722d7cbfc1f6aa8241f16dd814e011e1f41e8796";
+      };
+    }
+
+    {
+      name = "http-signature-1.2.0.tgz";
+      path = fetchurl {
+        name = "http-signature-1.2.0.tgz";
+        url  = "https://registry.yarnpkg.com/http-signature/-/http-signature-1.2.0.tgz";
+        sha1 = "9aecd925114772f3d95b65a60abb8f7c18fbace1";
+      };
+    }
+
+    {
+      name = "imurmurhash-0.1.4.tgz";
+      path = fetchurl {
+        name = "imurmurhash-0.1.4.tgz";
+        url  = "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz";
+        sha1 = "9218b9b2b928a238b13dc4fb6b6d576f231453ea";
+      };
+    }
+
+    {
+      name = "ip-regex-1.0.3.tgz";
+      path = fetchurl {
+        name = "ip-regex-1.0.3.tgz";
+        url  = "https://registry.yarnpkg.com/ip-regex/-/ip-regex-1.0.3.tgz";
+        sha1 = "dc589076f659f419c222039a33316f1c7387effd";
+      };
+    }
+
+    {
+      name = "is-callable-1.1.4.tgz";
+      path = fetchurl {
+        name = "is-callable-1.1.4.tgz";
+        url  = "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz";
+        sha1 = "1e1adf219e1eeb684d691f9d6a05ff0d30a24d75";
+      };
+    }
+
+    {
+      name = "is-date-object-1.0.1.tgz";
+      path = fetchurl {
+        name = "is-date-object-1.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz";
+        sha1 = "9aa20eb6aeebbff77fbd33e74ca01b33581d3a16";
+      };
+    }
+
+    {
+      name = "is-function-1.0.1.tgz";
+      path = fetchurl {
+        name = "is-function-1.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/is-function/-/is-function-1.0.1.tgz";
+        sha1 = "12cfb98b65b57dd3d193a3121f5f6e2f437602b5";
+      };
+    }
+
+    {
+      name = "is-obj-1.0.1.tgz";
+      path = fetchurl {
+        name = "is-obj-1.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/is-obj/-/is-obj-1.0.1.tgz";
+        sha1 = "3e4729ac1f5fde025cd7d83a896dab9f4f67db0f";
+      };
+    }
+
+    {
+      name = "is-regex-1.0.4.tgz";
+      path = fetchurl {
+        name = "is-regex-1.0.4.tgz";
+        url  = "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.4.tgz";
+        sha1 = "5517489b547091b0930e095654ced25ee97e9491";
+      };
+    }
+
+    {
+      name = "is-symbol-1.0.2.tgz";
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+        name = "uuid-3.3.2.tgz";
+        url  = "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz";
+        sha1 = "1b4af4955eb3077c501c23872fc6513811587131";
+      };
+    }
+
+    {
+      name = "verror-1.10.0.tgz";
+      path = fetchurl {
+        name = "verror-1.10.0.tgz";
+        url  = "https://registry.yarnpkg.com/verror/-/verror-1.10.0.tgz";
+        sha1 = "3a105ca17053af55d6e270c1f8288682e18da400";
+      };
+    }
+
+    {
+      name = "winreg-1.2.4.tgz";
+      path = fetchurl {
+        name = "winreg-1.2.4.tgz";
+        url  = "https://registry.yarnpkg.com/winreg/-/winreg-1.2.4.tgz";
+        sha1 = "ba065629b7a925130e15779108cf540990e98d1b";
+      };
+    }
+
+    {
+      name = "write-file-atomic-2.4.2.tgz";
+      path = fetchurl {
+        name = "write-file-atomic-2.4.2.tgz";
+        url  = "https://registry.yarnpkg.com/write-file-atomic/-/write-file-atomic-2.4.2.tgz";
+        sha1 = "a7181706dfba17855d221140a9c06e15fcdd87b9";
+      };
+    }
+
+    {
+      name = "xhr-2.5.0.tgz";
+      path = fetchurl {
+        name = "xhr-2.5.0.tgz";
+        url  = "https://registry.yarnpkg.com/xhr/-/xhr-2.5.0.tgz";
+        sha1 = "bed8d1676d5ca36108667692b74b316c496e49dd";
+      };
+    }
+
+    {
+      name = "xml-parse-from-string-1.0.1.tgz";
+      path = fetchurl {
+        name = "xml-parse-from-string-1.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/xml-parse-from-string/-/xml-parse-from-string-1.0.1.tgz";
+        sha1 = "a9029e929d3dbcded169f3c6e28238d95a5d5a28";
+      };
+    }
+
+    {
+      name = "xml2js-0.4.19.tgz";
+      path = fetchurl {
+        name = "xml2js-0.4.19.tgz";
+        url  = "https://registry.yarnpkg.com/xml2js/-/xml2js-0.4.19.tgz";
+        sha1 = "686c20f213209e94abf0d1bcf1efaa291c7827a7";
+      };
+    }
+
+    {
+      name = "xmlbuilder-9.0.7.tgz";
+      path = fetchurl {
+        name = "xmlbuilder-9.0.7.tgz";
+        url  = "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz";
+        sha1 = "132ee63d2ec5565c557e20f4c22df9aca686b10d";
+      };
+    }
+
+    {
+      name = "xtend-4.0.1.tgz";
+      path = fetchurl {
+        name = "xtend-4.0.1.tgz";
+        url  = "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz";
+        sha1 = "a5c6d532be656e23db820efb943a1f04998d63af";
+      };
+    }
+  ];
+}
diff --git a/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix b/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix
new file mode 100644
index 00000000000000..03f1cc2471e9ce
--- /dev/null
+++ b/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix
@@ -0,0 +1,77 @@
+{ stdenv, fetchFromGitHub, yarn2nix, makeWrapper, makeDesktopItem, electron, riot-web }:
+
+let
+  executableName = "riot-desktop";
+  version = "1.0.4";
+  riot-web-src = fetchFromGitHub {
+    owner = "vector-im";
+    repo = "riot-web";
+    rev = "v${version}";
+    sha256 = "152mi81miams5a7l9rd12bnf6wkd1r0lyicgr35r5fq0p6z7a4dk";
+  };
+
+in yarn2nix.mkYarnPackage rec {
+  name = "riot-desktop-${version}";
+  inherit version;
+
+  src = "${riot-web-src}/electron_app";
+
+  # The package manifest should be copied on each update of this package.
+  # > cp ${riot-web-src}/electron_app/package.json riot-desktop-package.json
+  packageJSON = ./riot-desktop-package.json;
+
+  # The dependency expression can be regenerated using nixos.yarn2nix with the following command:
+  # > yarn2nix --lockfile=${riot-web-src}/electron_app/yarn.lock > riot-desktop-yarndeps.nix
+  yarnNix = ./riot-desktop-yarndeps.nix;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = ''
+    # resources
+    mkdir -p "$out/share/riot"
+    ln -s '${riot-web}' "$out/share/riot/webapp"
+    cp -r '${riot-web-src}/origin_migrator' "$out/share/riot/origin_migrator"
+    cp -r '.' "$out/share/riot/electron"
+
+    # icons
+    for icon in $out/share/riot/electron/build/icons/*.png; do
+      mkdir -p "$out/share/icons/hicolor/$(basename $icon .png)/apps"
+      ln -s "$icon" "$out/share/icons/hicolor/$(basename $icon .png)/apps/riot.png"
+    done
+
+    # desktop item
+    mkdir -p "$out/share"
+    ln -s "${desktopItem}/share/applications" "$out/share/applications"
+
+    # executable wrapper
+    makeWrapper '${electron}/bin/electron' "$out/bin/${executableName}" \
+      --add-flags "$out/share/riot/electron"
+  '';
+
+  # The desktop item properties should be kept in sync with data from upstream:
+  # * productName and description from
+  #   https://github.com/vector-im/riot-web/blob/develop/electron_app/package.json
+  # * category and StartupWMClass from the build.linux section of
+  #   https://github.com/vector-im/riot-web/blob/develop/package.json
+  desktopItem = makeDesktopItem {
+    inherit name;
+    exec = executableName;
+    icon = "riot";
+    desktopName = "Riot";
+    genericName = "Matrix Client";
+    comment = meta.description;
+    categories = "Network;InstantMessaging;Chat;";
+    extraEntries = ''
+      StartupWMClass="riot"
+    '';
+  };
+
+  meta = with stdenv.lib; {
+    description = "A feature-rich client for Matrix.org";
+    homepage = https://about.riot.im/;
+    license = licenses.asl20;
+    maintainers = with maintainers; [ pacien ];
+    inherit (electron.meta) platforms;
+  };
+}
+
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f7436ec0887881..d77dac8082fdfe 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1678,6 +1678,8 @@ in
 
   ring-daemon = callPackage ../applications/networking/instant-messengers/ring-daemon { };
 
+  riot-desktop = callPackage ../applications/networking/instant-messengers/riot/riot-desktop.nix { };
+
   riot-web = callPackage ../applications/networking/instant-messengers/riot/riot-web.nix {
     conf = config.riot-web.conf or null;
   };