diff --git a/pkgs/development/tools/analysis/spin/default.nix b/pkgs/development/tools/analysis/spin/default.nix
index 284bf26782fe..1be5655b1e53 100644
--- a/pkgs/development/tools/analysis/spin/default.nix
+++ b/pkgs/development/tools/analysis/spin/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, makeWrapper, yacc, gcc
+{ stdenv, lib, requireFile, makeWrapper, yacc, gcc
 , withISpin ? true, tk, swarm, graphviz }:
 
 let
@@ -7,12 +7,17 @@ let
 
 in stdenv.mkDerivation rec {
   name = "spin-${version}";
-  version = "6.4.7";
+  version = "6.4.8";
   url-version = stdenv.lib.replaceChars ["."] [""] version;
 
-  src = fetchurl {
-    url = "http://spinroot.com/spin/Src/spin${url-version}.tar.gz";
-    sha256 = "17m2xaag0jns8hsa4466zxq35ylg9fnzynzvjjmx4ympbiil6mqv";
+  src = requireFile {
+    name = "spin${url-version}.tar.gz";
+    sha256 = "1rpazi5fj772121cn7r85fxypmaiv0x6x2l82b5y1xqzyf0fi4ph";
+    message = ''
+      reCAPTCHA is preventing us to download the file for you.
+      Please download it at http://spinroot.com/spin/Src/index.html
+      and add it to the nix-store using nix-prefetch-url.
+    '';
   };
 
   nativeBuildInputs = [ makeWrapper ];
@@ -20,6 +25,12 @@ in stdenv.mkDerivation rec {
 
   sourceRoot = "Spin/Src${version}";
 
+  unpackPhase = ''
+    # The archive is compressed twice
+    gunzip -c $src > spin.tar.gz
+    tar -xzf spin.tar.gz
+  '';
+
   installPhase = ''
     install -Dm755 spin $out/bin/spin
     wrapProgram $out/bin/spin \