diff --git a/code_sandboxes/__version__.py b/code_sandboxes/__version__.py
index e9139df..b8045f5 100644
--- a/code_sandboxes/__version__.py
+++ b/code_sandboxes/__version__.py
@@ -1 +1 @@
-__version__ = "1.11.2"
+__version__ = "1.11.3"
diff --git a/code_sandboxes/environments/adapters/datalayer.py b/code_sandboxes/environments/adapters/datalayer.py
index 430930b..e8fed0e 100644
--- a/code_sandboxes/environments/adapters/datalayer.py
+++ b/code_sandboxes/environments/adapters/datalayer.py
@@ -250,6 +250,10 @@ def _contract_user() -> list[str]:
         f"else useradd -u {uid} -g {gid} -d {home} -s /bin/bash {user}; fi "
         f"&& mkdir -p {home}/content {home}/.local/share/jupyter/runtime/external_kernels "
         f"&& chown -R {uid}:{gid} {home}",
+        # The config comes from the base's channel, which may start a kernel
+        # elsewhere; conformance:2 reads the kernel's cwd.
+        f"RUN echo \"c.MappingKernelManager.root_dir = '{contract.workdir}'\" "
+        ">> /usr/local/share/jupyter_config.py",
         f"ENV HOME={home} LANG={contract.locale} LC_ALL={contract.locale} "
         f"LANGUAGE={contract.locale} TZ=Etc/UTC PATH=$PATH:/opt/datalayer/bin",
         'ENTRYPOINT ["/opt/datalayer/bin/tini", "-g", "--"]',
diff --git a/tests/test_environment_foreign_contract_layer.py b/tests/test_environment_foreign_contract_layer.py
index ce006a6..baf1a79 100644
--- a/tests/test_environment_foreign_contract_layer.py
+++ b/tests/test_environment_foreign_contract_layer.py
@@ -500,3 +500,12 @@ def test_the_doctor_of_an_older_base_finds_its_working_directory():
     created = next(line for line in _contract_user() if "external_kernels" in line)
     assert "/home/datalayer/content" in created
     assert created.index("/home/datalayer/content") < created.index("chown -R")
+
+
+def test_the_kernel_runs_in_the_contracts_working_directory():
+    """`/usr/local/share/jupyter_config.py` is the channel's own, and a channel's
+    may start a kernel elsewhere: conformance:2 reads the kernel's cwd."""
+    from code_sandboxes.environments.adapters.datalayer import _contract_user
+
+    pinned = next(line for line in _contract_user() if "MappingKernelManager.root_dir" in line)
+    assert "/home/datalayer" in pinned and "/usr/local/share/jupyter_config.py" in pinned