python.pkgs.secp256k1: move expression

pkgs/development/python-modules/secp256k1/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pkgconfig
+, pytest_28
+, pytestrunner
+, cffi
+, secp256k1
+}:
+
+buildPythonPackage rec {
+  pname = "secp256k1";
+  version = "0.12.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0zrjxvzxqm4bz2jcy8sras8jircgbs6dkrw8j3nc6jhvzlikwwxl";
+  };
+
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ pytest_28 pytestrunner ];
+  propagatedBuildInputs = [ cffi secp256k1 ];
+
+  # Tests are not included in archive
+  doCheck = false;
+
+  preConfigure = ''
+    cp -r ${secp256k1.src} libsecp256k1
+    touch libsecp256k1/autogen.sh
+    export INCLUDE_DIR=${secp256k1}/include
+    export LIB_DIR=${secp256k1}/lib
+  '';
+
+  checkPhase = ''
+    py.test tests
+  '';
+
+  meta = {
+    homepage = https://github.com/ludbb/secp256k1-py;
+    description = "Python FFI bindings for secp256k1";
+    license = with lib.licenses; [ mit ];
+    maintainers = with lib.maintainers; [ chris-martin ];
+  };
+}