diff --git a/pkgs/development/compilers/rustc/generic.nix b/pkgs/development/compilers/rustc/generic.nix
index 9df259cee8e..2dc91cb5ec4 100644
--- a/pkgs/development/compilers/rustc/generic.nix
+++ b/pkgs/development/compilers/rustc/generic.nix
@@ -115,7 +115,7 @@ stdenv.mkDerivation {
 
   configureFlags = configureFlags
                 ++ [ "--enable-local-rust" "--local-rust-root=$snapshot" "--enable-rpath" ]
-                ++ [ "--llvm-root=${llvmPackages_37.llvm}" "--jemalloc-root=${jemalloc}/lib" ]
+                ++ [ "--llvm-root=${llvmPackages_37.llvm}" ] #"--jemalloc-root=${jemalloc}/lib" ]
                 ++ [ "--default-linker=${stdenv.cc}/bin/cc" "--default-ar=${stdenv.cc.binutils}/bin/ar" ]
                 ++ stdenv.lib.optional (stdenv.cc.cc ? isClang) "--enable-clang";
 
@@ -138,6 +138,11 @@ stdenv.mkDerivation {
     sed -i configure \
       -e '/probe_need CFG_CURLORWGET/d'
 
+    # Fix the use of jemalloc prefixes which our jemalloc doesn't have
+    # TODO: reenable if we can figure out how to get our jemalloc to work
+    #[ -f src/liballoc_jemalloc/lib.rs ] && sed -i 's,je_,,g' src/liballoc_jemalloc/lib.rs
+    #[ -f src/liballoc/heap.rs ] && sed -i 's,je_,,g' src/liballoc/heap.rs # Remove for 1.4.0+
+
     # Useful debugging parameter
     #export VERBOSE=1
   '';
diff --git a/pkgs/development/libraries/jemalloc/default.nix b/pkgs/development/libraries/jemalloc/default.nix
index e0272529907..4e13c9b1d93 100644
--- a/pkgs/development/libraries/jemalloc/default.nix
+++ b/pkgs/development/libraries/jemalloc/default.nix
@@ -1,18 +1,13 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "jemalloc-4.0.0";
+  name = "jemalloc-4.0.2";
 
   src = fetchurl {
     url = "http://www.canonware.com/download/jemalloc/${name}.tar.bz2";
-    sha256 = "1wiydkp8a4adwsgfsd688hpv2z7hjv5manhckchk96v6qdsbqk91";
+    sha256 = "04a6iw9wiwiknd7v3l3i7vpmc5nvv52islnb1hz9idmdk259r2hd";
   };
 
-  # Rust refers to jemalloc functions directly so make sure the prefix matchs.
-  configureFlags = [
-    "--with-jemalloc-prefix=je_"
-  ];
-
   meta = with stdenv.lib; {
     homepage = http://www.canonware.com/jemalloc/index.html;
     description = "a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support";
diff --git a/pkgs/games/dfhack/default.nix b/pkgs/games/dfhack/default.nix
new file mode 100644
index 00000000000..046f11545a5
--- /dev/null
+++ b/pkgs/games/dfhack/default.nix
@@ -0,0 +1,62 @@
+{ stdenv, fetchgit, dwarf_fortress, cmake, zlib, perl, XMLLibXML, XMLLibXSLT
+}:
+
+let
+  baseVersion = "40";
+  patchVersion = "24-r3";
+  src = fetchgit {
+    url = "https://github.com/DFHack/dfhack.git";
+    rev = "0849099f2083e100cae6f64940b4eff4c28ce2eb";
+    sha256 = "0lnqrayi8hwfivkrxb7fw8lb6v95i04pskny1px7084n7nzvyv8b";
+  };
+
+in
+
+assert stdenv.system == "i686-linux";
+assert dwarf_fortress.name == "dwarf-fortress-0.40.24";
+
+stdenv.mkDerivation rec {
+  name = "dfhack-0.${baseVersion}.${patchVersion}";
+
+  inherit baseVersion patchVersion src;
+
+  buildInputs = [ cmake zlib perl XMLLibXML XMLLibXSLT ];
+
+  preConfigure = ''
+    export cmakeFlags="-DCMAKE_INSTALL_PREFIX=$prefix/dfhack $cmakeFlags"
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd`/build/depends/protobuf
+  '';
+
+  installPhase = ''
+    mkdir -p $out/dfhack
+    make install
+    cp ../package/linux/dfhack $out/dfhack/
+    mkdir -p $out/bin
+    cat > $out/bin/dfhack_install_dir <<EOF
+    #!/bin/sh
+    test -z "\$1" && echo "This creates a Dwarf Fortress/DFHack game directory. Please specify a directory (preferably empty or non-existent) for this." && exit 1
+
+    set -e
+    mkdir -p "\$1"
+    cd "\$1"
+    cp -r ${dwarf_fortress}/share/df_linux/* .
+    cp -r $out/dfhack/* .
+    chmod -R u+w .
+    # use LD_LIBRARY_PATH setting from dwarf-fortress wrapper
+    sed -e 's%# Now run%`grep LD_LIBRARY_PATH ${dwarf_fortress}/bin/dwarf-fortress`%' $out/dfhack/dfhack > dfhack
+    # write md5sum of binary
+    sed -e s/c42f55948a448645d6609102ef6439e8/`md5sum ${dwarf_fortress}/share/df_linux/libs/Dwarf_Fortress | cut -f1 -d\ `/ $out/dfhack/hack/symbols.xml > hack/symbols.xml
+
+    echo "DFHack installed successfully in \$1. To play, run ./dfhack in it."
+
+    EOF
+    chmod +x $out/bin/dfhack_install_dir
+  '';
+
+  meta = {
+    description = "A Dwarf Fortress memory access library";
+    homepage = https://github.com/DFHack/dfhack;
+    license = stdenv.lib.licenses.bsd2;
+    maintainers = with stdenv.lib.maintainers; [ robbinch ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bb9392f9053..b07250dde28 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13507,6 +13507,10 @@ let
 
   crrcsim = callPackage ../games/crrcsim {};
 
+  dfhack = callPackage_i686 ../games/dfhack {
+    inherit (pkgsi686Linux.perlPackages) XMLLibXML XMLLibXSLT;
+  };
+
   dhewm3 = callPackage ../games/dhewm3 {};
 
   drumkv1 = callPackage ../applications/audio/drumkv1 { };