diff --git a/README.md b/README.md
index c9add123..e38f07f0 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ Usage
 
 <sup>¹ Requires a "third-party build host"; expected to work with cibuildwheel but not directly tested by our CI.</sup><br>
 
-`cibuildwheel` is not intended to run on your development machine. Because it uses system Python from Python.org it will try to install packages globally - not what you expect from a build tool! Instead, isolated CI services like those mentioned above are ideal.
+`cibuildwheel` is not intended to run on your development machine. Because it uses system Python from Python.org on macOS and Windows, it will try to install packages globally - not what you expect from a build tool! Instead, isolated CI services like those mentioned above are ideal. For Linux builds, it uses manylinux docker images, so those can be done locally for testing in a pinch.
 
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