Created attachment 892651 [details] build.log dev-python/notebook-7.1.3 fails to build with the following error: ValueError: Aborting. Could not find cmd (jlpm) in path. If command is not expected to be in user's path, use an absolute path. (build.log attached) Installing dev-python/jupyterlab-4.1.6 in the host environment has allowed the build to succeed. Apparently, dev-python/jupyterlab is a buildtime dependency of dev-python/notebook, not just runtime dependency.