trying out xonsh

pkgs/pygments.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, docutils
+, lxml
+, pytestCheckHook
+, wcag-contrast-ratio
+}:
+
+let pygments = buildPythonPackage
+  rec {
+    pname = "pygments";
+    version = "2.15.1";
+
+    src = fetchPypi {
+      pname = "Pygments";
+      inherit version;
+      sha256 = "sha256-is5NPB3UgYlLIAX1YOrQ+fGe5k/pgzZr4aIeFx0Sd1w=";
+    };
+
+    format = "egg";
+
+    propagatedBuildInputs = [
+      docutils
+    ];
+
+    # circular dependencies if enabled by default
+    doCheck = false;
+    checkInputs = [
+      lxml
+      pytestCheckHook
+      wcag-contrast-ratio
+    ];
+
+    disabledTestPaths = [
+      # 5 lines diff, including one nix store path in 20000+ lines
+      "tests/examplefiles/bash/ltmain.sh"
+    ];
+
+    pythonImportsCheck = [ "pygments" ];
+
+    passthru.tests = {
+      check = pygments.overridePythonAttrs (_: { doCheck = true; });
+    };
+
+    meta = with lib; {
+      homepage = "https://pygments.org/";
+      description = "A generic syntax highlighter";
+      license = licenses.bsd2;
+      maintainers = with maintainers; [ SuperSandro2000 ];
+    };
+  };
+in pygments