move python packages to pkgs/python-packages

Remove obsolete passthru from joinmarket because joinmarket packages are
now accessible via pkgs/python-packages.

pkgs/python-packages/python-bitcointx/default.nix

@@ -0,0 +1,27 @@
+{ lib, buildPythonPackage, fetchurl, secp256k1, openssl }:
+
+buildPythonPackage rec {
+  pname = "python-bitcointx";
+  version = "1.1.1.post0";
+
+  src = fetchurl {
+    url = "https://github.com/Simplexum/${pname}/archive/${pname}-v${version}.tar.gz";
+    sha256 = "d12593b09785a7a4ce08cb1928815c2366e9f6e4fab317267462857bf83904b0";
+  };
+
+  patchPhase = ''
+    for path in core/secp256k1.py tests/test_load_secp256k1.py; do
+      substituteInPlace "bitcointx/$path" \
+        --replace "ctypes.util.find_library('secp256k1')" "'${secp256k1}/lib/libsecp256k1.so'"
+    done
+    substituteInPlace bitcointx/core/key.py \
+      --replace "ctypes.util.find_library('ssl')" "'${openssl.out}/lib/libssl.so'"
+  '';
+
+  meta = with lib; {
+    description = "Interface to Bitcoin transaction data structures";
+    homepage = "https://github.com/Simplexum/python-bitcointx";
+    maintainers = with maintainers; [ nixbitcoin ];
+    license = licenses.gpl3;
+  };
+}