Add installation instructions

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diff --git a/README.md b/README.md
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+++ b/README.md
@@ -12,13 +12,38 @@ What's the worst thing that could happen if you install a malicious Python
 dependency on your computer? Which information could it gather from your files,
 and how could it make itself a permanent home on your computer?
 
+With `poetry-restrict-plugin`, that looks as follows:
+
+```sh
+$ ~/.local/bin/poetry run cat ~/.ssh/config
+poetry-restrict-plugin: Landlock engaged.
+cat: /home/jc/.ssh/config: Permission denied
+$ ~/.local/bin/poetry run ls ~/.ssh
+poetry-restrict-plugin: Landlock engaged.
+ls: cannot open directory '/home/jc/.ssh': Permission denied
+```
+
 
 ## Installation
 
 At time of writing, `poetry-restrict-plugin` is only supported on Linux with
 [the Landlock LSM](https://docs.kernel.org/userspace-api/landlock.html) enabled.
 
+With [`pipx`](https://pipx.pypa.io/stable/docs/):
+
+```sh
+pipx inject poetry https://git.jchri.st/jc/poetry-restrict-plugin/archive/master.tar.gz
+```
+
+For other installation methods, see the [Poetry plugin
+documentation](https://python-poetry.org/docs/plugins/#using-plugins).
+
+
+## Disclaimer
 
+`poetry-restrict-plugin` is not a perfect sandbox, and probably never will be.
+If you're looking for something like that,
+[nsjail](https://github.com/google/nsjail) might be interesting for you.
 
 
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