diff --git a/src/blenderbim/docs/devs/installation.rst b/src/blenderbim/docs/devs/installation.rst
index 10fbbfd339..5386e9be53 100644
--- a/src/blenderbim/docs/devs/installation.rst
+++ b/src/blenderbim/docs/devs/installation.rst
@@ -22,7 +22,8 @@ You will need to choose which build to download.
 - If you are on Blender >=3.1, choose py310
 - If you are on Blender >=2.93 and <3.1, choose py39
 - If you are on Blender <2.93, choose py37
-- Choose linux, macos, or win depending on your operating system
+- Choose ``linux``, ``macos``, ``macosm1`` (for Apple M1 devices), or ``win``
+  depending on your operating system
 
 Sometimes, a build may be delayed, or contain broken code. We try to avoid this,
 but it happens.
diff --git a/src/ifcopenshell-python/docs/ifcdiff.rst b/src/ifcopenshell-python/docs/ifcdiff.rst
index 046b72fb21..b73530cae4 100644
--- a/src/ifcopenshell-python/docs/ifcdiff.rst
+++ b/src/ifcopenshell-python/docs/ifcdiff.rst
@@ -28,7 +28,8 @@ Source installation
 
 1. :doc:`Install IfcOpenShell <ifcopenshell-python/installation>`
 2. `Clone the source code <https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.7.0/src/ifcdiff>`_.
-3. ``pip install -r requirements.txt``
+3. ``cd /path/to/src/ifcdiff``
+4. ``pip install -r requirements.txt``
 
 Here is a minimal example of how to use IfcDiff as a Python module or CLI
 utility:
@@ -69,6 +70,11 @@ Here is a minimal example of how to use IfcDiff as a library:
    For more information on how to use IfcDiff as a library, check out the :doc:`API
    reference <autoapi/ifcdiff/index>`.
 
+You can also alias it to a command:
+
+::
+
+    $ alias ifcdiff='python -m ifcdiff'
 
 Using the BlenderBIM Add-on
 ---------------------------
diff --git a/src/ifcopenshell-python/docs/ifcpatch.rst b/src/ifcopenshell-python/docs/ifcpatch.rst
new file mode 100644
index 0000000000..7407c2c3ab
--- /dev/null
+++ b/src/ifcopenshell-python/docs/ifcpatch.rst
@@ -0,0 +1,78 @@
+IfcPatch
+========
+
+IfcPatch is both a CLI utility and library that lets you run a predetermined
+modification on an IFC file, known as a patch recipe. This is great for running
+prepackaged scripts on IFC models on a server with a standardised interface.
+It's also great for distributing little scripts that need to modify an IFC to
+users who don't know how to code or aren't interested in knowing the details.
+
+Source installation
+-------------------
+
+1. :doc:`Install IfcOpenShell <ifcopenshell-python/installation>`
+2. `Clone the source code <https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.7.0/src/ifcpatch>`_.
+3. ``cd /path/to/src/ifcpatch``
+
+Here is a minimal example of how to use IfcPatch as a Python module or CLI
+utility:
+
+::
+
+    $ python -m ifcpatch -h
+
+    usage: __main__.py [-h] -i INPUT [-o OUTPUT] -r RECIPE [-l LOG]
+                       [-a ARGUMENTS [ARGUMENTS ...]]
+
+    Patches IFC files to fix badly formatted data
+
+    optional arguments:
+      -h, --help            show this help message and exit
+      -i INPUT, --input INPUT
+                            The IFC file to patch
+      -o OUTPUT, --output OUTPUT
+                            The output file to save the patched IFC
+      -r RECIPE, --recipe RECIPE
+                            Name of the recipe to use when patching
+      -l LOG, --log LOG     Specify a log file
+      -a ARGUMENTS [ARGUMENTS ...], --arguments ARGUMENTS [ARGUMENTS ...]
+                            Specify custom arguments to the patch recipe
+
+Exactly how it is run depends on the recipe. A recipe may require zero or more
+arguments which are specific to the recipe. Here's an example which runs the
+`ExtractElements` recipe, which, as the same suggests, extracts out elements.
+This recipe expects one argument, which uses the [IFC Query
+syntax](https://wiki.osarch.org/index.php?title=IfcOpenShell_code_examples#IFC_Query_Syntax).
+In this example, we'll extract out all `IfcWall` elements.
+
+::
+
+    $ ifcpatch -i input.ifc -o output.ifc -r ExtractElements -a ".IfcWall"
+    $ cat output.ifc
+
+Here is a minimal example of how to use IfcDiff as a library:
+
+.. code-block:: python
+
+    import ifcpatch
+
+    ifcpatch.execute({
+        "input": "input.ifc",
+        "output": "output.ifc",
+        "recipe": "ExtractElements",
+        "log": "ifcpatch.log",
+        "arguments": [".IfcWall"],
+    })
+
+You can also alias it to a command:
+
+::
+
+    $ alias ifcpatch='python -m ifcpatch'
+
+Alternatively, you can package it as an executable.
+
+::
+
+    $ python make.py
+    $ ./dist/ifcpatch
diff --git a/src/ifcopenshell-python/docs/index.rst b/src/ifcopenshell-python/docs/index.rst
index b2d3c866eb..471fe7d047 100644
--- a/src/ifcopenshell-python/docs/index.rst
+++ b/src/ifcopenshell-python/docs/index.rst
@@ -17,6 +17,7 @@ IfcOpenShell is a suite of developer libraries and utilities to manipulate OpenB
    ifcconvert
    bimtester
    ifcdiff
+   ifcpatch
    ifcclash
    ifccobie
    ifcmax
diff --git a/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py b/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
index dc630e6d4d..c21ed1acf1 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
@@ -18,6 +18,8 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
+import ifcopenshell.util.placement
 
 
 class Usecase: