python.pkgs.intervaltree: move to separate expression

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

@@ -0,0 +1,33 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, python, pytest, sortedcontainers }:
+
+buildPythonPackage rec {
+  version = "2.1.0";
+  pname = "intervaltree";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "02w191m9zxkcjqr1kv2slxvhymwhj3jnsyy3a28b837pi15q19dc";
+  };
+
+  buildInputs = [ pytest ];
+
+  propagatedBuildInputs = [ sortedcontainers ];
+
+  checkPhase = ''
+    runHook preCheck
+    # pytest will try to run tests for nix_run_setup.py / files in build/lib which fails
+    mv nix_run_setup.py run_setup
+    rm build -rf
+    ${python.interpreter} run_setup test
+    runHook postCheck
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Editable interval tree data structure for Python 2 and 3";
+    homepage =  https://github.com/chaimleib/intervaltree;
+    license = [ licenses.asl20 ];
+    maintainers =  [ maintainers.bennofs ];
+  };
+}