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setup.py

@@ -10,7 +10,7 @@ eigen_include_dir = os.environ.get("EIGEN_INCLUDE_DIR")
 if eigen_include_dir is None:
     raise EnvironmentError(
         "EIGEN_INCLUDE_DIR environment variable is not set. "
-        "Please set it to the path of Eigen's include directory."
+        "Please set it in your .pixi.sh to the path of Eigen's include directory."
     )