diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
index d180ea290adba..41a24dc8a9f7b 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
@@ -1,8 +1,3 @@
-# This file is generated from generate_nix.rb. DO NOT EDIT.
-# Execute the following command in a temporary directory to update the file.
-#
-# ruby generate_nix.rb > default.nix
-
 { stdenv, fetchurl, config
 , gconf
 , alsaLib
@@ -39,121 +34,10 @@
 
 assert stdenv.isLinux;
 
-let
-  version = "31.1.2";
-  sources = [
-    { locale = "id"; arch = "linux-i686"; sha256 = "210f0037279ec373d5d189a8724962fec3237900c343ca93d2421ca93a35f201"; }
-    { locale = "id"; arch = "linux-x86_64"; sha256 = "7436275f73a1292567cc587bd41439ecb724fac5e092f0b0f2af932bf39805f7"; }
-    { locale = "he"; arch = "linux-i686"; sha256 = "14b878d70f96e60e3a73134c3cbb35cc6d468446b588510ae5f2e8934d8fbb3b"; }
-    { locale = "he"; arch = "linux-x86_64"; sha256 = "6edabe4a5bf81274cb117bdf7ec7d0b89f3759b9f31e1b9e03c0c603cda2e91f"; }
-    { locale = "el"; arch = "linux-i686"; sha256 = "9f65b45570f83d41b856f99b3077e6e112fa65b3762eb51277269fdbf07cfdb2"; }
-    { locale = "el"; arch = "linux-x86_64"; sha256 = "6a500164772c004d851f13d77a7a9b84428b5c372fdba6f0936c1ddd398d9087"; }
-    { locale = "tr"; arch = "linux-i686"; sha256 = "fb5f9ab606101cfebe86f64f64b9e46ecd73a704c1a2a993e4b4d68129d84484"; }
-    { locale = "tr"; arch = "linux-x86_64"; sha256 = "54517217aa8cf4d715dd2c7d5cf7c4b96bd5f0add2dda9d9d9412ea10b4210a4"; }
-    { locale = "ast"; arch = "linux-i686"; sha256 = "2ff66a151f4003b5dc0432b43e1038e0c69645c58fc5d6015cab3e493a8ed9a7"; }
-    { locale = "ast"; arch = "linux-x86_64"; sha256 = "e34c892ff3fe761c2707036c5ea3453fe411dca2ad2e474ead7ef0c209558e06"; }
-    { locale = "nl"; arch = "linux-i686"; sha256 = "46154b1fab58e9040e4e67b01ae2c5865b644ccf8f2239c396725bf063eae640"; }
-    { locale = "nl"; arch = "linux-x86_64"; sha256 = "271f169763271582698b8ec23d9ca463b41a7d2b373b56d9c170179e15f0fc34"; }
-    { locale = "bn-BD"; arch = "linux-i686"; sha256 = "2b3f2e9933bcda04abc5785b77630cedcba2d85a73a9d535d895ed7910c97d54"; }
-    { locale = "bn-BD"; arch = "linux-x86_64"; sha256 = "e4878b6ec24d75cba9e991f6b852ec280992b205bca0e82a2aecfd9a607cdbb4"; }
-    { locale = "eu"; arch = "linux-i686"; sha256 = "b2ff2e8b6c9b7ee81d0965380d15e080c204ffac35b687ca29ca41b51804b491"; }
-    { locale = "eu"; arch = "linux-x86_64"; sha256 = "7afd4c4618f4e7758875ae58295e340289eb994723d3eea13c388751878e0b4e"; }
-    { locale = "fr"; arch = "linux-i686"; sha256 = "41f07408eaec108a28f03917820329c801a386ad3628ebdeb7abd852e579ae72"; }
-    { locale = "fr"; arch = "linux-x86_64"; sha256 = "ea667afbfeba6901a56cc44751d6bf202ef978ce7e39719e56c1fe31a622922b"; }
-    { locale = "br"; arch = "linux-i686"; sha256 = "cea91b552b14e4a417d288d93b4db10b787a1a15316ed7de0b3016be359ddcc5"; }
-    { locale = "br"; arch = "linux-x86_64"; sha256 = "8d72d7cca4885f527a8e8d2b8e2950d0ea0e5d1a840bcde38c08a77e3b6a69a7"; }
-    { locale = "pa-IN"; arch = "linux-i686"; sha256 = "92a28502463e92e6bb9cf7854358c13757222433f9931703a2df4d1ef93bdcbb"; }
-    { locale = "pa-IN"; arch = "linux-x86_64"; sha256 = "6b61650491252bb441a13b2fa550d9bdd76e6f23a0e5da641fde4372637c451c"; }
-    { locale = "gd"; arch = "linux-i686"; sha256 = "4d35dfe5c9d66ea8f81fa0e5957152296f9af31968b8ed4975563c480abf2da8"; }
-    { locale = "gd"; arch = "linux-x86_64"; sha256 = "3647b5345ac4fa5cc6cd301fefbe538d2442110f93cccb5e8eca4227bcbcd661"; }
-    { locale = "bg"; arch = "linux-i686"; sha256 = "b06afea38900f268b95787c257d960de8c0174f582e51434aa97a9535fac43a4"; }
-    { locale = "bg"; arch = "linux-x86_64"; sha256 = "c4ae2aebdd91543cf3c64ea25931327f6e8d2113b59d0b2fbb19561b4f935134"; }
-    { locale = "sv-SE"; arch = "linux-i686"; sha256 = "854d4c53fd22c5c1f4635ed41e7dadc6f0603439380e3d3f15ea7a5db5721941"; }
-    { locale = "sv-SE"; arch = "linux-x86_64"; sha256 = "64842c6606e2102434ed0b33bcb53d0cdef08e4b55e67e85b3c1244a7dab32d5"; }
-    { locale = "ja"; arch = "linux-i686"; sha256 = "6632eec0a8bf14a77590fae44113d417589634a97cd0b57ef4ede7623cd5b632"; }
-    { locale = "ja"; arch = "linux-x86_64"; sha256 = "727c25136106eca05d4c0bbddbe01672decc4a9f55b3246290c1c6e41cbef946"; }
-    { locale = "pt-BR"; arch = "linux-i686"; sha256 = "986ae49f92e2bab52cc3a4da4f9ca9bce34c01e96126d4fd9fe41d39d16a8ee3"; }
-    { locale = "pt-BR"; arch = "linux-x86_64"; sha256 = "c208dc5adb8bbe39535ec28836425d66d557d4ebb111aca9c0d025750ad0d3c4"; }
-    { locale = "is"; arch = "linux-i686"; sha256 = "ee8b101070f820849ec2bde48b76e102cf750bbcee106f47238259bb3cb791bb"; }
-    { locale = "is"; arch = "linux-x86_64"; sha256 = "19471d5e13856f85fc395b825fb297f88805bba5d1d6c2999c49c4947cc6ed43"; }
-    { locale = "es-AR"; arch = "linux-i686"; sha256 = "b21ec0c7e2ee24b971828ae02419f06e3d9447c5e30b1c8257a1d8e1b5ac383e"; }
-    { locale = "es-AR"; arch = "linux-x86_64"; sha256 = "6f8eda76fe19bd590e4f8e23e491edc93b870b72064814eb0d6352c99513397f"; }
-    { locale = "nn-NO"; arch = "linux-i686"; sha256 = "217a6b195255c841ff42f181aa4fa54bd76a91de61662098d96c4fb9e7d6b79a"; }
-    { locale = "nn-NO"; arch = "linux-x86_64"; sha256 = "f11ce6f7ef22cb99674668bfcd0f3614a4a9e162f9608fa1290ae26c6c199560"; }
-    { locale = "sr"; arch = "linux-i686"; sha256 = "85f32820095ee3b50716731b2b369378cf530fd1f3ef3522a5cd55e00fb4ce5e"; }
-    { locale = "sr"; arch = "linux-x86_64"; sha256 = "d67b98991de46de52f84627ccb7f2888551343eef94a5d7562e587fcd8d968ec"; }
-    { locale = "si"; arch = "linux-i686"; sha256 = "14914642dc540c6a0fa0df5816eb35b39b822dac4da58a79d9cfe1c3bf7ed1c0"; }
-    { locale = "si"; arch = "linux-x86_64"; sha256 = "c0421803b2be6704151177c0d13557a9d828e3b3333cd214734e2ed4aafce105"; }
-    { locale = "ro"; arch = "linux-i686"; sha256 = "9226cd799114fcec9c1b53b403708e62ca9f151d43bb53167b822cd3ca779171"; }
-    { locale = "ro"; arch = "linux-x86_64"; sha256 = "05e13ad7c9a53a123c3a50e858285f730a4a5ec95e93074cfda990f4466a1c4f"; }
-    { locale = "it"; arch = "linux-i686"; sha256 = "ed9b4f3bfd457d00792795584bf17bebf4b42967c111cf4f778aa7e88b437407"; }
-    { locale = "it"; arch = "linux-x86_64"; sha256 = "301dbc22a9af014aeb6f151ac1f6ff67ef667dabe31c5e487681f682bf8d567b"; }
-    { locale = "pl"; arch = "linux-i686"; sha256 = "9894e91593b3d825d2572af8c520c8be5dd791a267bb056180dc4415d55f4dc1"; }
-    { locale = "pl"; arch = "linux-x86_64"; sha256 = "0531f815bc4325f150465c753ffe849577931e47eb9528df3b58e666155856f0"; }
-    { locale = "sk"; arch = "linux-i686"; sha256 = "4633afa9f32f6aa1bc91c1ca2e6d1b5622192c9a82fd4c591e0f6a3095ab0baf"; }
-    { locale = "sk"; arch = "linux-x86_64"; sha256 = "2121bd74ce76a0ec1734e3171c8da8ac4d935c99f6c16344639ff7e60de9a860"; }
-    { locale = "vi"; arch = "linux-i686"; sha256 = "d10a856d94c790281500cf1c41683255a858eecc43afaa74819ef2d3559216e9"; }
-    { locale = "vi"; arch = "linux-x86_64"; sha256 = "964343e1ee3209dea0a90dcb1f5371cb0f949b68e059aa23fe80d53747a4699c"; }
-    { locale = "rm"; arch = "linux-i686"; sha256 = "f28ce0029dc5fb3212bd020065c2d453d36db53c98df1806f0e4192ef3d8c5da"; }
-    { locale = "rm"; arch = "linux-x86_64"; sha256 = "fb532732406c8338bfb947e20ee6a95ff1bb18b1d6eadcd7525153393894bdf9"; }
-    { locale = "ar"; arch = "linux-i686"; sha256 = "5e05b156179978920c4c7ed995ef018ddaa6332c5fe1898d94314412d11567b0"; }
-    { locale = "ar"; arch = "linux-x86_64"; sha256 = "acba5a042588731e8b1af0dcc7e075577551969d7c1081c23df6feae7f4d107d"; }
-    { locale = "es-ES"; arch = "linux-i686"; sha256 = "92c6f00a0e014617b5fb53167c821f17f550e8307fcd4af831cde04891f00b40"; }
-    { locale = "es-ES"; arch = "linux-x86_64"; sha256 = "191c531621e961b25bf8f16c2aad2ac57357d3456f84fc5efb4f7b7e9becc202"; }
-    { locale = "fi"; arch = "linux-i686"; sha256 = "2f061035a0b6b07bb81d9f84f1bad9a7fd50b0546417fc047102e684683241c5"; }
-    { locale = "fi"; arch = "linux-x86_64"; sha256 = "ee7b57cfbc15104568e12d0cc81a14118c7b0f2708963fbe2ba8ca7a2ce30a0b"; }
-    { locale = "hu"; arch = "linux-i686"; sha256 = "a493b0d327f608a815654a74b22f0ab3237b139998b8720c197468fc624754b6"; }
-    { locale = "hu"; arch = "linux-x86_64"; sha256 = "2b9e87e794e6ac423fd7e6c5500b8a63dc2f8a6a4bdf39de2bbfa5c06a2a8f67"; }
-    { locale = "zh-CN"; arch = "linux-i686"; sha256 = "d272ea7a87f15a649c8d6089b6a5eac91ca732b760163e36ee6634ac2a186313"; }
-    { locale = "zh-CN"; arch = "linux-x86_64"; sha256 = "2b71cab0bfd437a6c79125cbe0ccb82bc1fe257c6aa24b0b63c1a8456334e6e0"; }
-    { locale = "uk"; arch = "linux-i686"; sha256 = "56a04b6a6a27d9eea98bb5539c927870a3a43aaace14d31faf54dd56b8ef128b"; }
-    { locale = "uk"; arch = "linux-x86_64"; sha256 = "99e33539eff6a48d944f47fc86a98e07ab4395e90e509c050403e70820b11db4"; }
-    { locale = "ko"; arch = "linux-i686"; sha256 = "4c7a67b83db3c15cb8385ec057eff849e59841d2c6e82f6839f76c747c09fd02"; }
-    { locale = "ko"; arch = "linux-x86_64"; sha256 = "5e54ad0316c905a2fc137365e34ba24391ec3a12c638f1947d8048b9747b2a21"; }
-    { locale = "cs"; arch = "linux-i686"; sha256 = "735d14680ba5108d9d422fda161d0cd1cf31ffb2d29d66b33671c58504436290"; }
-    { locale = "cs"; arch = "linux-x86_64"; sha256 = "031b6f8a2f9a14689e91d887754221a972d4c9aa02807209126aa0d26be18b04"; }
-    { locale = "be"; arch = "linux-i686"; sha256 = "604db8cb078699262bf01f81a97bb745bda26efdb7e81bdae66ae5fe9f546c48"; }
-    { locale = "be"; arch = "linux-x86_64"; sha256 = "62a3ed654691720ff2cb2402efb450dcbe395baecd6c20dcba3d45455bfb68d1"; }
-    { locale = "ru"; arch = "linux-i686"; sha256 = "81b2a2eab496824d109faf49b6df93adc9dce838058f3f70c9e9c99ad251baf3"; }
-    { locale = "ru"; arch = "linux-x86_64"; sha256 = "6cdf95dd941475554630709d89fb802e8744bae7645ad9164dc2e8af701d195e"; }
-    { locale = "ta-LK"; arch = "linux-i686"; sha256 = "422f2173eae85a95611ba14a9945aac7b44076764b7c67d2c4198b3e6fe2fad7"; }
-    { locale = "ta-LK"; arch = "linux-x86_64"; sha256 = "d3d3dfc439bcb26cdb8d8f1ef0a9a24e804a6928aa6ac4f9ea2c0994c3e6e2c4"; }
-    { locale = "zh-TW"; arch = "linux-i686"; sha256 = "6d0e3db5748fa2bce8ebc3b51098241ba80971afea629836a37e4f84feeb0c85"; }
-    { locale = "zh-TW"; arch = "linux-x86_64"; sha256 = "4dd79725f91c163cd5a2073d52f3f599c2e0e95281e8235df0a20c9f8717fa07"; }
-    { locale = "de"; arch = "linux-i686"; sha256 = "7b1fb8c036729ee18507e0c3529cbaf93e8776801fba9bd8c93fa7b56dcf460e"; }
-    { locale = "de"; arch = "linux-x86_64"; sha256 = "926b0ad5e817af337b2f2f7416f98e935b5a6b90171816207275413c04dffb2c"; }
-    { locale = "nb-NO"; arch = "linux-i686"; sha256 = "a0c9e3abe9f3835166237a9ee12dffdc1e3255b59a47e3ed0f19ecf5a6f41ba8"; }
-    { locale = "nb-NO"; arch = "linux-x86_64"; sha256 = "173c030e3bba69c1634587a4032e4d0b49f37e0a94ba75c4deda7f23d25b21cc"; }
-    { locale = "fy-NL"; arch = "linux-i686"; sha256 = "25f3ca3328c99421db81e4d88b8fe51e913b01430e0db412699b11fef0c81240"; }
-    { locale = "fy-NL"; arch = "linux-x86_64"; sha256 = "df9f7737dddd56fb233d029c83c46a18470f992bc2b0222b54e1c4c36bde135b"; }
-    { locale = "sq"; arch = "linux-i686"; sha256 = "181bbb3808b28a5dc170db90db69a99137ce5d49c559c59c4a185b1ee48bea3d"; }
-    { locale = "sq"; arch = "linux-x86_64"; sha256 = "8b06fb2d2e4027aaa3ca5032823b203f5e2628c7673dd956103636916cf28a32"; }
-    { locale = "ga-IE"; arch = "linux-i686"; sha256 = "e7679ef7d467aeaa796af37e62a48fb08e60299cdeb6cea07fcbd8253cda7288"; }
-    { locale = "ga-IE"; arch = "linux-x86_64"; sha256 = "83a4b3a22de8be841be0967cda71dcc05958dddb690b7f90d80f1f6235555a49"; }
-    { locale = "da"; arch = "linux-i686"; sha256 = "b7db83686a2e9bf5e501ae32b608189af09eca9f4996b975960fcab3a97a10d2"; }
-    { locale = "da"; arch = "linux-x86_64"; sha256 = "aa081115593e5225f5fb47a9ba5bcd983da1c9e088f1a9f5cea3710afda75cd9"; }
-    { locale = "hr"; arch = "linux-i686"; sha256 = "99698f7259b1c3fa21600c43aa2a946376547a852e04f5a20478282bdbbb99d8"; }
-    { locale = "hr"; arch = "linux-x86_64"; sha256 = "bb2958eea731689b4fa48e98604233ef03b4de89107d801f72b12843cbc6fc70"; }
-    { locale = "ca"; arch = "linux-i686"; sha256 = "988e95cda1b412663bcbf1c1b552ad24b889fdfc30e7228bc47ac7f14aa43b31"; }
-    { locale = "ca"; arch = "linux-x86_64"; sha256 = "ac1f417ddc5b62f674f86f25a248d1434d996453892b4825ffb38852436d2df5"; }
-    { locale = "en-US"; arch = "linux-i686"; sha256 = "9209fa7bdada6245717dbfaf517d68cef04719812504bc0c988def6adc7baab5"; }
-    { locale = "en-US"; arch = "linux-x86_64"; sha256 = "6e2f046dae0a6fa80de190b95667340abcb0ddaddf1ecee813099a89142c56e1"; }
-    { locale = "pt-PT"; arch = "linux-i686"; sha256 = "f4acc2f18f55d7578555ac0b189aeb834adb6c3911ee665790fe4799774c8fe4"; }
-    { locale = "pt-PT"; arch = "linux-x86_64"; sha256 = "2dc24f408fc801df266f2b890109c2e7d4a0d47bc2db7f541d371037ffad8ff8"; }
-    { locale = "gl"; arch = "linux-i686"; sha256 = "b9e89373d2d1b0123095cd45867014f87bc2696093127448e7b7b9cf72d294e6"; }
-    { locale = "gl"; arch = "linux-x86_64"; sha256 = "191f8f5327e8a7607497b990dce09e6219c444cbe9261fdbf709cdd07d6cd57f"; }
-    { locale = "lt"; arch = "linux-i686"; sha256 = "80cb0818fce6c8130c9344d3259a7bbc1722c1e7896853d365ad06cc4ccddd82"; }
-    { locale = "lt"; arch = "linux-x86_64"; sha256 = "347027a7c82330f5bc1989a19afb6dde415c260ad4de6c312bd1bda30d4f7651"; }
-    { locale = "en-GB"; arch = "linux-i686"; sha256 = "94f2742fd3a88826eab8712e77a503fb340437ed0a2c1657b64f13b8522c0ad6"; }
-    { locale = "en-GB"; arch = "linux-x86_64"; sha256 = "8319f02f751d0683e5d015d32da3e12c94cb8a8fd27f8cdf5cd583e6e594bdfd"; }
-    { locale = "sl"; arch = "linux-i686"; sha256 = "076ed4c9c2ed99769e278ed0965ca5da7efd00bc9fb225e36cffb712b7cedca5"; }
-    { locale = "sl"; arch = "linux-x86_64"; sha256 = "e37bf18f4e32f050ac97b1a20cfa44832d4438524e2ef9c4ca82e7ed8c1307cb"; }
-    { locale = "et"; arch = "linux-i686"; sha256 = "afc9aef58f08bf8f4b300308a5a4e527ba93e1bae024983063efd82e96c36703"; }
-    { locale = "et"; arch = "linux-x86_64"; sha256 = "d46257893e5e1f17757f0b53c9201b12bc4e5b27bde1eecb007a858f61c49fab"; }
-    { locale = "hy-AM"; arch = "linux-i686"; sha256 = "8a1cbc00e4e6cffb3a225d9334e9c2372050203a0cba3b31c6537e02404efedb"; }
-    { locale = "hy-AM"; arch = "linux-x86_64"; sha256 = "ae17a6fb60f27bb95a11501a061c7ab9deb0a6ba89b17e6cf01394e18710a831"; }
-  ];
+# imports `version` and `sources`
+with (import ./sources.nix);
 
+let
   arch = if stdenv.system == "i686-linux"
     then "linux-i686"
     else "linux-x86_64";
@@ -177,7 +61,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "http://download-installer.cdn.mozilla.net/pub/thunderbird/releases/${version}/${source.arch}/${source.locale}/thunderbird-${version}.tar.bz2";
-    inherit (source) sha256;
+    inherit (source) sha1;
   };
 
   phases = "unpackPhase installPhase";
diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_nix.rb b/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_nix.rb
deleted file mode 100644
index fe2ed59389ef9..0000000000000
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_nix.rb
+++ /dev/null
@@ -1,213 +0,0 @@
-version = if ARGV.empty?
-            "latest"
-          else
-            ARGV[0]
-          end
-
-base_path = "download-installer.cdn.mozilla.net/pub/thunderbird/releases"
-
-arches = ["linux-i686", "linux-x86_64"]
-
-arches.each do |arch|
-  system("wget", "--recursive", "--continue", "--no-parent", "--reject-regex", ".*\\?.*", "--reject", "xpi", "http://#{base_path}/#{version}/#{arch}/")
-end
-
-locales = Dir.glob("#{base_path}/#{version}/#{arches[0]}/*").map do |path|
-  File.basename(path)
-end
-
-locales.delete("index.html")
-locales.delete("xpi")
-
-real_version = Dir.glob("#{base_path}/#{version}/#{arches[0]}/#{locales[0]}/thunderbird-*")[0].match(/thunderbird-([0-9.]*)/)[1][0..-2]
-
-locale_arch_path_tuples = locales.flat_map do |locale|
-  arches.map do |arch|
-    path = Dir.glob("#{base_path}/#{version}/#{arch}/#{locale}/thunderbird-*")[0]
-
-    [locale, arch, path]
-  end
-end
-
-paths = locale_arch_path_tuples.map do |tuple| tuple[2] end
-
-hashes = IO.popen(["sha256sum", "--binary", *paths]) do |input|
-  input.each_line.map do |line|
-    $stderr.puts(line)
-
-    line.match(/^[0-9a-f]*/)[0]
-  end
-end
-
-
-puts(<<"EOH")
-# This file is generated from generate_nix.rb. DO NOT EDIT.
-# Execute the following command in a temporary directory to update the file.
-#
-# ruby generate_nix.rb > default.nix
-
-{ stdenv, fetchurl, config
-, gconf
-, alsaLib
-, at_spi2_atk
-, atk
-, cairo
-, cups
-, curl
-, dbus_glib
-, dbus_libs
-, fontconfig
-, freetype
-, gdk_pixbuf
-, glib
-, glibc
-, gst_plugins_base
-, gstreamer
-, gtk
-, kerberos
-, libX11
-, libXScrnSaver
-, libXext
-, libXinerama
-, libXrender
-, libXt
-, libcanberra
-, libgnome
-, libgnomeui
-, mesa
-, nspr
-, nss
-, pango
-}:
-
-assert stdenv.isLinux;
-
-let
-  version = "#{real_version}";
-  sources = [
-EOH
-
-locale_arch_path_tuples.zip(hashes) do |tuple, hash|
-  locale, arch, path = tuple
-
-  puts(%Q|    { locale = "#{locale}"; arch = "#{arch}"; sha256 = "#{hash}"; }|)
-end
-
-puts(<<'EOF')
-  ];
-
-  arch = if stdenv.system == "i686-linux"
-    then "linux-i686"
-    else "linux-x86_64";
-
-  isPrefixOf = prefix: string:
-    builtins.substring 0 (builtins.stringLength prefix) string == prefix;
-
-  sourceMatches = locale: source:
-      (isPrefixOf source.locale locale) && source.arch == arch;
-
-  systemLocale = config.i18n.defaultLocale or "en-US";
-
-  defaultSource = stdenv.lib.findFirst (sourceMatches "en-US") {} sources;
-
-  source = stdenv.lib.findFirst (sourceMatches systemLocale) defaultSource sources;
-
-in
-
-stdenv.mkDerivation {
-  name = "thunderbird-bin-${version}";
-
-  src = fetchurl {
-    url = "http://download-installer.cdn.mozilla.net/pub/thunderbird/releases/${version}/${source.arch}/${source.locale}/thunderbird-${version}.tar.bz2";
-    inherit (source) sha256;
-  };
-
-  phases = "unpackPhase installPhase";
-
-  libPath = stdenv.lib.makeLibraryPath
-    [ stdenv.gcc.gcc
-      gconf
-      alsaLib
-      at_spi2_atk
-      atk
-      cairo
-      cups
-      curl
-      dbus_glib
-      dbus_libs
-      fontconfig
-      freetype
-      gdk_pixbuf
-      glib
-      glibc
-      gst_plugins_base
-      gstreamer
-      gtk
-      kerberos
-      libX11
-      libXScrnSaver
-      libXext
-      libXinerama
-      libXrender
-      libXt
-      libcanberra
-      libgnome
-      libgnomeui
-      mesa
-      nspr
-      nss
-      pango
-    ] + ":" + stdenv.lib.makeSearchPath "lib64" [
-      stdenv.gcc.gcc
-    ];
-
-  installPhase =
-    ''
-      mkdir -p "$prefix/usr/lib/thunderbird-bin-${version}"
-      cp -r * "$prefix/usr/lib/thunderbird-bin-${version}"
-
-      mkdir -p "$out/bin"
-      ln -s "$prefix/usr/lib/thunderbird-bin-${version}/thunderbird" "$out/bin/"
-
-      for executable in \
-        thunderbird mozilla-xremote-client thunderbird-bin plugin-container \
-        updater
-      do
-        patchelf --interpreter "$(cat $NIX_GCC/nix-support/dynamic-linker)" \
-          "$out/usr/lib/thunderbird-bin-${version}/$executable"
-      done
-
-      for executable in \
-        thunderbird mozilla-xremote-client thunderbird-bin plugin-container \
-        updater libxul.so
-      do
-        patchelf --set-rpath "$libPath" \
-          "$out/usr/lib/thunderbird-bin-${version}/$executable"
-      done
-
-      # Create a desktop item.
-      mkdir -p $out/share/applications
-      cat > $out/share/applications/thunderbird.desktop <<EOF
-      [Desktop Entry]
-      Type=Application
-      Exec=$out/bin/thunderbird
-      Icon=$out/lib/thunderbird-bin-${version}/chrome/icons/default/default256.png
-      Name=Thunderbird
-      GenericName=Mail Reader
-      Categories=Application;Network;
-      EOF
-    '';
-
-  meta = with stdenv.lib; {
-    description = "Mozilla Thunderbird, a full-featured email client";
-    homepage = http://www.mozilla.org/thunderbird/;
-    license = {
-      shortName = "unfree"; # not sure
-      fullName = "unfree";
-      url = http://www.mozilla.org/en-US/foundation/trademarks/policy/;
-    };
-    maintainers = with stdenv.lib.maintainers; [ fuuzetsu ];
-    platforms = platforms.linux;
-  };
-}
-EOF
diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_sources.rb b/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_sources.rb
new file mode 100644
index 0000000000000..72b9d1599e0f4
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/generate_sources.rb
@@ -0,0 +1,46 @@
+require "open-uri"
+
+version = if ARGV.empty?
+            "latest"
+          else
+            ARGV[0]
+          end
+
+base_path = "http://download-installer.cdn.mozilla.net/pub/thunderbird/releases"
+
+Source = Struct.new(:hash, :arch, :locale, :filename)
+
+sources = open("#{base_path}/#{version}/SHA1SUMS") do |input|
+  input.readlines
+end.select do |line|
+  /\/thunderbird-.*\.tar\.bz2$/ === line && !(/source/ === line)
+end.map do |line|
+  hash, name = line.chomp.split(/ +/)
+  Source.new(hash, *(name.split("/")))
+end.sort_by do |source|
+  [source.locale, source.arch]
+end
+
+real_version = sources[0].filename.match(/thunderbird-([0-9.]*)\.tar\.bz2/)[1]
+
+arches = ["linux-i686", "linux-x86_64"]
+
+puts(<<"EOH")
+# This file is generated from generate_nix.rb. DO NOT EDIT.
+# Execute the following command in a temporary directory to update the file.
+#
+# ruby generate_source.rb > source.nix
+
+{
+  version = "#{real_version}";
+  sources = [
+EOH
+
+sources.each do |source|
+  puts(%Q|    { locale = "#{source.locale}"; arch = "#{source.arch}"; sha1 = "#{source.hash}"; }|)
+end
+
+puts(<<'EOF')
+  ];
+}
+EOF
diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/sources.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/sources.nix
new file mode 100644
index 0000000000000..803657f129307
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/sources.nix
@@ -0,0 +1,120 @@
+# This file is generated from generate_nix.rb. DO NOT EDIT.
+# Execute the following command in a temporary directory to update the file.
+#
+# ruby generate_source.rb > source.nix
+
+{
+  version = "31.2.0";
+  sources = [
+    { locale = "ar"; arch = "linux-i686"; sha1 = "d56d0a2590e04fca857f5083be846b8de73a138c"; }
+    { locale = "ar"; arch = "linux-x86_64"; sha1 = "8e6f0280225e71859cedf72307e12179e71b2bca"; }
+    { locale = "ast"; arch = "linux-i686"; sha1 = "ca2544e5b09b065df8763e8c803856a3313c12b7"; }
+    { locale = "ast"; arch = "linux-x86_64"; sha1 = "71487e868e4a2a87fc2f1550c3c6959016cf4de4"; }
+    { locale = "be"; arch = "linux-i686"; sha1 = "1620d97545765499b37eb05d04bf6d9ee1470544"; }
+    { locale = "be"; arch = "linux-x86_64"; sha1 = "1aebaef6d0e05c6e8ca0d7673b5ab7d9123305ed"; }
+    { locale = "bg"; arch = "linux-i686"; sha1 = "af62f41d3abb604ea4c9bd7ef297eaa28f65e00c"; }
+    { locale = "bg"; arch = "linux-x86_64"; sha1 = "d67bba94639d967e65328fb989696e4e461a0bd3"; }
+    { locale = "bn-BD"; arch = "linux-i686"; sha1 = "7d7180ab9fdb0694ea93842f79411038f576c3a9"; }
+    { locale = "bn-BD"; arch = "linux-x86_64"; sha1 = "4794ee971d932272ac809e2cdf432de5f38e0073"; }
+    { locale = "br"; arch = "linux-i686"; sha1 = "533b40426ca2ad796ffe8ce45051701c27c179be"; }
+    { locale = "br"; arch = "linux-x86_64"; sha1 = "921b1d5a09a3ee282dead4762176eade35a18270"; }
+    { locale = "ca"; arch = "linux-i686"; sha1 = "01858a6bd869dd5060899af428924c3e5d700ee6"; }
+    { locale = "ca"; arch = "linux-x86_64"; sha1 = "1d64573818675c956b4b61b5501b1c2420dfd894"; }
+    { locale = "cs"; arch = "linux-i686"; sha1 = "582dacac45ba886232cc0e9b2757996af1c61fd6"; }
+    { locale = "cs"; arch = "linux-x86_64"; sha1 = "6dc0aa493e90c1c24b2cb3c323a4778413371486"; }
+    { locale = "da"; arch = "linux-i686"; sha1 = "c64e7c50015d4cd633695f98715b6082f23bfb5f"; }
+    { locale = "da"; arch = "linux-x86_64"; sha1 = "10bc1b1758a1cc53fb9503d8ae02c92e640bfb13"; }
+    { locale = "de"; arch = "linux-i686"; sha1 = "69be28626ef89fba20b568cc026786c82a6a3dd6"; }
+    { locale = "de"; arch = "linux-x86_64"; sha1 = "4d43592b2b28241c3e95c089f52b5adfb6c60d80"; }
+    { locale = "el"; arch = "linux-i686"; sha1 = "881a8a8021ee63ed0d62c594bee464532b2d63f9"; }
+    { locale = "el"; arch = "linux-x86_64"; sha1 = "53a30b91a9391e673537ba23ab194573bb40535f"; }
+    { locale = "en-GB"; arch = "linux-i686"; sha1 = "acc98d20faccfcbaaff944957b334598faf73351"; }
+    { locale = "en-GB"; arch = "linux-x86_64"; sha1 = "01ba64dc0228f17c3afc86559a541bc1fd71646a"; }
+    { locale = "en-US"; arch = "linux-i686"; sha1 = "fb035b98358fd697e31162f639a5f01d1f43490b"; }
+    { locale = "en-US"; arch = "linux-x86_64"; sha1 = "26be2c2f908054dc3c8b3d53bfe3a840aae56428"; }
+    { locale = "es-AR"; arch = "linux-i686"; sha1 = "10049cd0188485a6ab61519402fa74d62e9cab2b"; }
+    { locale = "es-AR"; arch = "linux-x86_64"; sha1 = "f579cd0579ff249dc100658cc0e7e6677a28976d"; }
+    { locale = "es-ES"; arch = "linux-i686"; sha1 = "fb9174c60d66141fdf568c92259b02579e70e9fe"; }
+    { locale = "es-ES"; arch = "linux-x86_64"; sha1 = "8f0f216d81badf5bffd976c0472d9f1318672e48"; }
+    { locale = "et"; arch = "linux-i686"; sha1 = "052477b4febfb97d446976d81453289850a61aa3"; }
+    { locale = "et"; arch = "linux-x86_64"; sha1 = "6a6341649624e9932714d32d750501e71dbb3106"; }
+    { locale = "eu"; arch = "linux-i686"; sha1 = "effe11b4ab62a11c110e0edfd9b46c5c8f259133"; }
+    { locale = "eu"; arch = "linux-x86_64"; sha1 = "5152d64bf47f7b92a1e33b42ba1b48596f7069d8"; }
+    { locale = "fi"; arch = "linux-i686"; sha1 = "6b3019504e9a97db8eae5a35c2b963ebdca144ed"; }
+    { locale = "fi"; arch = "linux-x86_64"; sha1 = "a44a93c9c727ecb64f6f83a3fa6c66fc0f1a1153"; }
+    { locale = "fr"; arch = "linux-i686"; sha1 = "31c96279136afe886465eae51b6f32d3f13e53bb"; }
+    { locale = "fr"; arch = "linux-x86_64"; sha1 = "c2923291007f5480d2913d6093b38233939f089a"; }
+    { locale = "fy-NL"; arch = "linux-i686"; sha1 = "00425ba7a789dca73ad5cb3a65bc08040f1a8d2f"; }
+    { locale = "fy-NL"; arch = "linux-x86_64"; sha1 = "a462db5d04e8ad7c3840912b8445041391d01973"; }
+    { locale = "ga-IE"; arch = "linux-i686"; sha1 = "2158427e0f838e958d40a1d3b6a4e50127ac00ea"; }
+    { locale = "ga-IE"; arch = "linux-x86_64"; sha1 = "2390c016ee8b52cf927e4f9cb74b20d65fe06de3"; }
+    { locale = "gd"; arch = "linux-i686"; sha1 = "d7e2675b58ff68bff21fb9d0ce0643073df4e491"; }
+    { locale = "gd"; arch = "linux-x86_64"; sha1 = "ba01c8483e05a4b612443c8172737d901f665666"; }
+    { locale = "gl"; arch = "linux-i686"; sha1 = "9e2895f43b978304e42ec714b01857f494cea265"; }
+    { locale = "gl"; arch = "linux-x86_64"; sha1 = "c1cf1ee118b1133f8df6314a2aa8e83be14b4d5b"; }
+    { locale = "he"; arch = "linux-i686"; sha1 = "a0a872333657bccb342a086a576f273fd34a2d21"; }
+    { locale = "he"; arch = "linux-x86_64"; sha1 = "6ceb775435b2ed0a14f11c096b595361baf6282d"; }
+    { locale = "hr"; arch = "linux-i686"; sha1 = "8975da24b95de228584cd5c8ab8c6d174f0fcd60"; }
+    { locale = "hr"; arch = "linux-x86_64"; sha1 = "23467c23408408c878afe00244bf4779b1eead03"; }
+    { locale = "hu"; arch = "linux-i686"; sha1 = "690b220b01a1bcd683409fca76d50a507e09241e"; }
+    { locale = "hu"; arch = "linux-x86_64"; sha1 = "99ff74aab54f05295199edcb0e06b0fc68bff234"; }
+    { locale = "hy-AM"; arch = "linux-i686"; sha1 = "ed490aa96fce3e61c61ea60f7353edc06fffb5ce"; }
+    { locale = "hy-AM"; arch = "linux-x86_64"; sha1 = "f907190eedbcca43e830f632416a0cfd4df9c77e"; }
+    { locale = "id"; arch = "linux-i686"; sha1 = "3e328a1dd6c29f38913171aae8939f636eb9c845"; }
+    { locale = "id"; arch = "linux-x86_64"; sha1 = "ed074968abf7fb207c747c88a21d1f5834228445"; }
+    { locale = "is"; arch = "linux-i686"; sha1 = "2da9b0ade06b20c19a90eb192c85e17ed96487b1"; }
+    { locale = "is"; arch = "linux-x86_64"; sha1 = "7eefd8c52f95ed4c011ec1b95b4b7b1237801cdd"; }
+    { locale = "it"; arch = "linux-i686"; sha1 = "c46a316fe393dd2353802e488a31b55699ee8d62"; }
+    { locale = "it"; arch = "linux-x86_64"; sha1 = "3e13de5f40f71455a1bf2e562c0ea07833ed28a6"; }
+    { locale = "ja"; arch = "linux-i686"; sha1 = "1a3e904090d6786f23b88cd91afa2f34fc732c70"; }
+    { locale = "ja"; arch = "linux-x86_64"; sha1 = "8b8259bb4cbd30bc0e7aff95585d3f29e9bdd566"; }
+    { locale = "ko"; arch = "linux-i686"; sha1 = "af8db8f0a4329babec9ede706ce36e0f5dcc714e"; }
+    { locale = "ko"; arch = "linux-x86_64"; sha1 = "0397e824b2f2158b0862fe2ac7d192bc8c2c0a8b"; }
+    { locale = "lt"; arch = "linux-i686"; sha1 = "b53dae618889ef676053154517b69c05f0051ffe"; }
+    { locale = "lt"; arch = "linux-x86_64"; sha1 = "cb82a5027aecb830197b764c86452a008da5f55f"; }
+    { locale = "nb-NO"; arch = "linux-i686"; sha1 = "7cca3934255d4f73f35fff9ef90e0c2ea48e856b"; }
+    { locale = "nb-NO"; arch = "linux-x86_64"; sha1 = "4b86d7723efd32be9722012e17ca0d49560fe22a"; }
+    { locale = "nl"; arch = "linux-i686"; sha1 = "dc7430d675f88aa0f7e4b78fa93572305ed97222"; }
+    { locale = "nl"; arch = "linux-x86_64"; sha1 = "e9e9f7ed4308d496bb6490ac252f236bcd659bda"; }
+    { locale = "nn-NO"; arch = "linux-i686"; sha1 = "5a5f40de1986de090a59205446ce5918910c2ae1"; }
+    { locale = "nn-NO"; arch = "linux-x86_64"; sha1 = "649eea7ff3be8b2d8cb0fa9df623e8f38117132d"; }
+    { locale = "pa-IN"; arch = "linux-i686"; sha1 = "5255472c604dd97b44433ab76c34d4e6c1e44d17"; }
+    { locale = "pa-IN"; arch = "linux-x86_64"; sha1 = "8a1e3a0ec2400a43b41856fb111e86392d29a1fe"; }
+    { locale = "pl"; arch = "linux-i686"; sha1 = "b279dbd5bfe1e45ac65891b6632461c8f76ac9b0"; }
+    { locale = "pl"; arch = "linux-x86_64"; sha1 = "46b827110e9bb188075fa58088b2bec1a2762609"; }
+    { locale = "pt-BR"; arch = "linux-i686"; sha1 = "f2bcec6668773a907368d9d04cc3fb018992637c"; }
+    { locale = "pt-BR"; arch = "linux-x86_64"; sha1 = "f91868c8678862da540e7e7ba9fc1ae1756de0db"; }
+    { locale = "pt-PT"; arch = "linux-i686"; sha1 = "4f62468a76e73b98f85bc13c48ad0e9c62cded36"; }
+    { locale = "pt-PT"; arch = "linux-x86_64"; sha1 = "a3647ab9b35f22e6ca6b0f943321f40c4376659f"; }
+    { locale = "rm"; arch = "linux-i686"; sha1 = "fb0af4d895b50cbb20fa049c83c0f47f8cf494d4"; }
+    { locale = "rm"; arch = "linux-x86_64"; sha1 = "49501a9a00349a2db0be269831b76021f5a4d116"; }
+    { locale = "ro"; arch = "linux-i686"; sha1 = "4b03ae9f43f6b1c473fe170fae4141a1aa2898d5"; }
+    { locale = "ro"; arch = "linux-x86_64"; sha1 = "0e0dc3b8836696b5453cef65c343b77c42df0e7a"; }
+    { locale = "ru"; arch = "linux-i686"; sha1 = "35c31b019b2c97f534f8ca33dcfb00503c712704"; }
+    { locale = "ru"; arch = "linux-x86_64"; sha1 = "814eb4985e17a88af793e1e9dd657fd9b9a32822"; }
+    { locale = "si"; arch = "linux-i686"; sha1 = "f700ffb1ce581fc19f4abbaa9139d4be904bace4"; }
+    { locale = "si"; arch = "linux-x86_64"; sha1 = "bd772880dac1bee8208dbf6a3e1a244af2d884aa"; }
+    { locale = "sk"; arch = "linux-i686"; sha1 = "6ff95241e3feab5c003a0dc9020ab089d0286f0e"; }
+    { locale = "sk"; arch = "linux-x86_64"; sha1 = "7dfb864346fd853d83d910d98e1e530f049372d6"; }
+    { locale = "sl"; arch = "linux-i686"; sha1 = "f9f824a578f77c13a8e39c9c5e756de8e05255cb"; }
+    { locale = "sl"; arch = "linux-x86_64"; sha1 = "32e1e3983f0ea5e972f82d3c0f4663386f8da991"; }
+    { locale = "sq"; arch = "linux-i686"; sha1 = "5b04196a291058c7c68485a245d73d01a2adfc27"; }
+    { locale = "sq"; arch = "linux-x86_64"; sha1 = "1860030149e4568e8b24922dbed0673bc72aa7a2"; }
+    { locale = "sr"; arch = "linux-i686"; sha1 = "c88e8d47f4078cb06600c4b6128b3d7a62239608"; }
+    { locale = "sr"; arch = "linux-x86_64"; sha1 = "195c76ce3b8cbc4d8a6cfb015116bbf57ffbed7e"; }
+    { locale = "sv-SE"; arch = "linux-i686"; sha1 = "d19cfcfce1118693c0dee00dc8dbdc657932e817"; }
+    { locale = "sv-SE"; arch = "linux-x86_64"; sha1 = "92a1bd6764eef68e537c45c77b893da55ba910bc"; }
+    { locale = "ta-LK"; arch = "linux-i686"; sha1 = "4bf45f785006cf30305d11aedf00d0038995e7e2"; }
+    { locale = "ta-LK"; arch = "linux-x86_64"; sha1 = "30be2773e6922e6abc4af33cca35964425059fca"; }
+    { locale = "tr"; arch = "linux-i686"; sha1 = "3a7de4dbed32a7d7b0faa20246f2ffc07ab31b44"; }
+    { locale = "tr"; arch = "linux-x86_64"; sha1 = "d64aea1cdf318d08321681f70ff22d7f80ae9e4e"; }
+    { locale = "uk"; arch = "linux-i686"; sha1 = "48d3a17e0b24c55e1fe3b73b019365e38653b187"; }
+    { locale = "uk"; arch = "linux-x86_64"; sha1 = "ba89e2038eac2e8ad34ac4296feda8c62f170143"; }
+    { locale = "vi"; arch = "linux-i686"; sha1 = "06ebf22992bc3890df6fae5955bb9791b9bb1339"; }
+    { locale = "vi"; arch = "linux-x86_64"; sha1 = "3e5d8b660e799eeeb37bb5b0fbf86d4d44fa31ba"; }
+    { locale = "zh-CN"; arch = "linux-i686"; sha1 = "5a697d19c7890f600697dea64aa5ecff8ef0e5a1"; }
+    { locale = "zh-CN"; arch = "linux-x86_64"; sha1 = "3226435da70e0aae98eaee1fb1c9a87af7167403"; }
+    { locale = "zh-TW"; arch = "linux-i686"; sha1 = "53a2c162f9186dca91cc35f5298285f4f9da7a55"; }
+    { locale = "zh-TW"; arch = "linux-x86_64"; sha1 = "12cdf96a7cc3ea40cd9542d8a7d16827116e65d7"; }
+  ];
+}