add bitcoin-xt as a separate package

lib/maintainers.nix

@@ -121,6 +121,7 @@
   jagajaga = "Arseniy Seroka <ars.seroka@gmail.com>";
   jb55 = "William Casarin <bill@casarin.me>";
   jcumming = "Jack Cummings <jack@mudshark.org>";
+  jefdaj = "Jeffrey David Johnson <jefdaj@gmail.com>";
   jfb = "James Felix Black <james@yamtime.com>";
   jgeerds = "Jascha Geerds <jg@ekby.de>";
   jirkamarsik = "Jirka Marsik <jiri.marsik89@gmail.com>";

pkgs/applications/altcoins/bitcoin-xt.nix

@@ -0,0 +1,39 @@
+{ stdenv, fetchurl, pkgconfig, autoreconfHook, openssl, db48, boost
+, zlib, miniupnpc, qt4, utillinux, protobuf, qrencode, curl
+, withGui }:
+
+with stdenv.lib;
+stdenv.mkDerivation rec{
+
+  name = "bitcoin" + (toString (optional (!withGui) "d")) + "-xt-" + version;
+  xt_version = "0.11A";
+  version = xt_version;
+
+  src = fetchurl {
+    url = "https://github.com/bitcoinxt/bitcoinxt/archive/v0.11A.tar.gz";
+    sha256 = "129cbqf6bln6rhdk70c6nfwdjk6afvsaaw4xdyp0pnfand8idz7n";
+  };
+
+  buildInputs = [ pkgconfig autoreconfHook openssl db48 boost zlib
+                  miniupnpc utillinux protobuf curl ]
+                  ++ optionals withGui [ qt4 qrencode ];
+
+  configureFlags = [
+    "--with-boost-libdir=${boost.lib}/lib"
+    "--with-libcurl-headers=${curl}/include"
+  ] ++ optionals withGui [ "--with-gui=qt4" ];
+
+  meta = {
+    description = "Peer-to-peer electronic cash system";
+    longDescription= ''
+       Bitcoin XT is an implementation of a Bitcoin full node, based upon the
+       source code of Bitcoin Core. It is built by taking the latest stable
+       Core release, applying a series of patches, and then doing deterministic
+       builds so anyone can check the downloads correspond to the source code. 
+    '';
+    homepage = "https://bitcoinxt.software/";
+    maintainers = with maintainers; [ jefdaj ];
+    license = licenses.mit;
+    platforms = platforms.unix;
+  };
+}

pkgs/applications/altcoins/default.nix

@@ -5,6 +5,9 @@ rec {
   bitcoin  = callPackage ./bitcoin.nix { withGui = true; };
   bitcoind = callPackage ./bitcoin.nix { withGui = false; };
 
+  bitcoin-xt  = callPackage ./bitcoin-xt.nix { withGui = true; };
+  bitcoind-xt = callPackage ./bitcoin-xt.nix { withGui = false; };
+
   darkcoin  = callPackage ./darkcoin.nix { withGui = true; };
   darkcoind = callPackage ./darkcoin.nix { withGui = false; };
 

pkgs/top-level/all-packages.nix

@@ -10764,6 +10764,7 @@ let
     callPackage = newScope { boost = boost157; };
   } );
   bitcoin = altcoins.bitcoin;
+  bitcoin-xt = altcoins.bitcoin-xt;
 
   aumix = callPackage ../applications/audio/aumix {
     gtkGUI = false;