diff --git a/var/spack/repos/builtin/packages/py-nbclassic/package.py b/var/spack/repos/builtin/packages/py-nbclassic/package.py
index 4e1415a9153..96cc0c67104 100644
--- a/var/spack/repos/builtin/packages/py-nbclassic/package.py
+++ b/var/spack/repos/builtin/packages/py-nbclassic/package.py
@@ -12,9 +12,13 @@ class PyNbclassic(PythonPackage):
     homepage = "https://github.com/jupyterlab/nbclassic"
     pypi     = "nbclassic/nbclassic-0.3.1.tar.gz"
 
+    version('0.3.5', sha256='99444dd63103af23c788d9b5172992f12caf8c3098dd5a35c787f0df31490c29')
     version('0.3.1', sha256='f920f8d09849bea7950e1017ff3bd101763a8d68f565a51ce053572e65aa7947')
 
     depends_on('python@3.6:', type=('build', 'run'))
     depends_on('py-setuptools', type='build')
+    # TODO: replace this after concretizer learns how to concretize separate build deps
+    depends_on('py-jupyter-packaging11', when='@0.3.3:', type='build')
+    # depends_on('py-jupyter-packaging@0.9:1', when='@0.3.3:', type='build')
     depends_on('py-jupyter-server@1.8:1', type=('build', 'run'))
     depends_on('py-notebook@:6', type=('build', 'run'))