diff --git a/.gitmodules b/.gitmodules
index 2238a80..5777b22 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -46,11 +46,11 @@
 	path = src/hispec/driver/newport
 	url = https://github.com/COO-Utilities/newport
 	branch = main
-[submodule "etc/PIPython"]
-	path = etc/PIPython
+[submodule "external/PIPython"]
+	path = external/PIPython
 	url = https://github.com/PI-PhysikInstrumente/PIPython
-[submodule "etc/camera-interface"]
-	path = etc/camera-interface
+[submodule "external/camera-interface"]
+	path = external/camera-interface
 	url = https://github.com/CaltechOpticalObservatories/camera-interface
 	branch = main
 [submodule "src/hispec/driver/pdu"]
diff --git a/etc/PIPython b/external/PIPython
similarity index 100%
rename from etc/PIPython
rename to external/PIPython
diff --git a/etc/camera-interface b/external/camera-interface
similarity index 100%
rename from etc/camera-interface
rename to external/camera-interface
diff --git a/src/hispec/driver/tracking_camera/README.md b/src/hispec/driver/tracking_camera/README.md
index 34c89bf..9ebc5e3 100644
--- a/src/hispec/driver/tracking_camera/README.md
+++ b/src/hispec/driver/tracking_camera/README.md
@@ -6,9 +6,9 @@ everything common to any camerad camera.
 
 ## Prerequisite
 
-pycamerad wraps `camera_interface`, a pybind11 module built from
+pycamerad wraps a pybind11 module built from
 [camera-interface](https://github.com/CaltechOpticalObservatories/camera-interface),
-checked out here as the `etc/camera-interface` submodule. It is a compiled
+checked out here as the `external/camera-interface` submodule. It is a compiled
 extension built per instrument rather than a package on an index, so it cannot
 be a dependency in `pyproject.toml` and has to be installed separately.
 
@@ -16,17 +16,19 @@ Install it into whichever environment you run hispec from, alongside hispec
 itself:
 
 ```bash
-pip install ./etc/camera-interface \
-  --config-settings=cmake.define.INSTRUMENT=hispec_tracking_camera
+pip install ./external/camera-interface/packaging/tracking
 ```
 
-Add `--config-settings=cmake.define.ENABLE_SHM_OUTPUT=ON` for the
+That package fixes the instrument and names the module
+`camera_interface_tracking`, which is what `TrackingCamera.MODULE_NAME` loads.
+Building a second instrument under its own name lets both live in one
+environment. Add `--config-settings=cmake.define.ENABLE_SHM_OUTPUT=ON` for the
 shared-memory output, and `cmake.define.ImageStreamIO_DIR=<dir>` if
 ImageStreamIO is not under `/usr/local/lib/cmake`.
 
-`import camera_interface` then works with no `PYTHONPATH`, and `camerad` is on
-`PATH` whenever that environment is active. pybind11 is fetched into an
-isolated build environment, so it never has to be installed by hand.
+The import then works with no `PYTHONPATH`, and `camerad` is on `PATH`
+whenever that environment is active. pybind11 is fetched into an isolated
+build environment, so it never has to be installed by hand.
 
 ### Build dependencies
 
diff --git a/src/hispec/driver/tracking_camera/camera.py b/src/hispec/driver/tracking_camera/camera.py
index cf6f15e..93df605 100644
--- a/src/hispec/driver/tracking_camera/camera.py
+++ b/src/hispec/driver/tracking_camera/camera.py
@@ -52,6 +52,8 @@ def width(self) -> int:
 class TrackingCamera(Camerad):
     """The HISPEC tracking camera, adding its instrument commands."""
 
+    MODULE_NAME = "camera_interface_tracking"
+
     ### lifecycle
 
     def initialize(self) -> None: