diff --git a/pkgs/applications/networking/p2p/mldonkey/default.nix b/pkgs/applications/networking/p2p/mldonkey/default.nix
index 6bc6dce38f8..3dab78eaebf 100644
--- a/pkgs/applications/networking/p2p/mldonkey/default.nix
+++ b/pkgs/applications/networking/p2p/mldonkey/default.nix
@@ -1,11 +1,11 @@
 {stdenv, fetchurl, ocaml, zlib, bzip2, ncurses, file, gd, libpng }:
 
 stdenv.mkDerivation (rec {
-  name = "mldonkey-3.0.2";
+  name = "mldonkey-3.0.4";
   
   src = fetchurl {
     url = "mirror://sourceforge/mldonkey/${name}.tar.bz2";
-    sha256 = "0l1gcgsn603l2lv5jxjjr44r7kq2hpfcy98w3y2gf5n9d4fhja84";
+    sha256 = "0wnyi2m7126dq6r5zbqplgknnypzcx0p3q2mxcdfhp94ln7vn3f6";
   };
   
   meta = {
@@ -13,6 +13,8 @@ stdenv.mkDerivation (rec {
     homepage = http://mldonkey.sourceforge.net/;
   };
 
+  patches = [ ./gcc44mips64_2.patch ];
+
   buildInputs = [ ocaml zlib ncurses bzip2 file gd libpng ];
   configureFlags = [ "--disable-gui" ];
 } // (if (stdenv.system != "i686-linux" && stdenv.system != "x86_64-linux") then
diff --git a/pkgs/applications/networking/p2p/mldonkey/gcc44mips64_2.patch b/pkgs/applications/networking/p2p/mldonkey/gcc44mips64_2.patch
new file mode 100644
index 00000000000..f48d2551109
--- /dev/null
+++ b/pkgs/applications/networking/p2p/mldonkey/gcc44mips64_2.patch
@@ -0,0 +1,16 @@
+diff --git a/src/utils/lib/CryptoPP.cc b/src/utils/lib/CryptoPP.cc
+index 9208e1c..788df83 100644
+--- a/src/utils/lib/CryptoPP.cc
++++ b/src/utils/lib/CryptoPP.cc
+@@ -1880,7 +1880,10 @@ public:
+ 		#elif defined(__x86_64__)
+ 			__asm__("mulq %3" : "=d" (r.m_halfs.high), "=a" (r.m_halfs.low) : "a" (a), "rm" (b) : "cc");
+ 		#elif defined(__mips64)
+-			__asm__("dmultu %2,%3" : "=h" (r.m_halfs.high), "=l" (r.m_halfs.low) : "r" (a), "r" (b));
++      typedef unsigned int uint128_t __attribute__((mode(TI)));
++      uint128_t tmp = (uint128_t) a * b;
++      r.m_halfs.high = tmp >> 64;
++      r.m_halfs.low = (tmp << 64) >> 64;
+ 		#elif defined(_M_IX86)
+ 			// for testing
+ 			word64 t = (word64)a * b;
diff --git a/pkgs/development/compilers/ocaml/3.11.1.nix b/pkgs/development/compilers/ocaml/3.11.1.nix
index 66c8319600f..48265f9aa3d 100644
--- a/pkgs/development/compilers/ocaml/3.11.1.nix
+++ b/pkgs/development/compilers/ocaml/3.11.1.nix
@@ -1,8 +1,8 @@
 { stdenv, fetchurl, ncurses, x11 }:
 
 let
-   useX11 = stdenv.system != "armv5tel-linux";
-   useNativeCompilers = stdenv.system != "armv5tel-linux";
+   useX11 = stdenv.isi686 || stdenv.isx86_64;
+   useNativeCompilers = stdenv.isi686 || stdenv.isx86_64 || stdenv.isMips;
    inherit (stdenv.lib) optionals optionalString;
 in
 
@@ -15,14 +15,18 @@ stdenv.mkDerivation rec {
     sha256 = "8c36a28106d4b683a15c547dfe4cb757a53fa9247579d1cc25bd06a22cc62e50";
   };
 
+  # Needed to avoid a SIGBUS on the final executable on mips
+  NIX_CFLAGS_COMPILE = if stdenv.isMips then "-fPIC" else "";
+
   prefixKey = "-prefix ";
   configureFlags = ["-no-tk"] ++ optionals useX11 [ "-x11lib" x11 ];
   buildFlags = "world" + optionalString useNativeCompilers " bootstrap world.opt";
   buildInputs = [ncurses] ++ optionals useX11 [ x11 ];
   installTargets = "install" + optionalString useNativeCompilers " installopt";
-  patchPhase = ''
+  prePatch = ''
     CAT=$(type -tp cat)
     sed -e "s@/bin/cat@$CAT@" -i config/auto-aux/sharpbang
+    patch -p1 -l < ${./mips64.patch}
   '';
   postBuild = ''
     ensureDir $out/include
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 813043027a1..ce77ad815de 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -821,7 +821,7 @@ let
 
   mktemp = callPackage ../tools/security/mktemp { };
 
-  mldonkey = callPackage ../applications/networking/p2p/mldonkey { };
+  mldonkey = misc.debugVersion (callPackage ../applications/networking/p2p/mldonkey { });
 
   monit = builderDefsPackage ../tools/system/monit {
     flex = flex2535;