trying out xonsh

pkgs/coconut.nix

@@ -0,0 +1,44 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, cpyparsing
+, ipykernel
+, mypy
+, pexpect
+, pygments
+, pytestCheckHook
+, prompt-toolkit
+, tkinter
+, watchdog
+, pkgs
+}:let
+  pygments = pkgs.python310Packages.callPackage ./pygments.nix {}; 
+in buildPythonPackage rec {
+  pname = "coconut";
+  version = "3.0.2";
+
+  src = fetchFromGitHub {
+    owner = "evhub";
+    repo = "coconut";
+    rev = "v${version}";
+    sha256 = lib.fakeSha256;
+  };
+
+  propagatedBuildInputs = [ cpyparsing ipykernel mypy pygments prompt-toolkit watchdog ];
+
+  checkInputs = [ pexpect pytestCheckHook tkinter ];
+
+  # Currently most tests have performance issues
+  pytestFlagsArray = [
+    "coconut/tests/constants_test.py"
+  ];
+
+  pythonImportsCheck = [ "coconut" ];
+
+  meta = with lib; {
+    homepage = "http://coconut-lang.org/";
+    description = "Simple, elegant, Pythonic functional programming";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ fabianhjr ];
+  };
+}