diff --git a/doc/developer.build.rst b/doc/developer.build.rst
index d50c9c36d..5f4b86c6d 100644
--- a/doc/developer.build.rst
+++ b/doc/developer.build.rst
@@ -188,7 +188,7 @@ Use `pip` to install from the **root directory of the source tree**:
 
    python -m venv venv
    source venv/bin/activate
-   python -m pip install .[test,doc]
+   python -m pip install ".[test,doc]"
 
 .. tip::