diff --git a/readme.md b/readme.md
index 0b4c2a64..a43c14df 100644
--- a/readme.md
+++ b/readme.md
@@ -96,7 +96,10 @@ conda activate foundationpose
 
 # Install Eigen3 3.4.0 under conda environment
 conda install conda-forge::eigen=3.4.0
-export CMAKE_PREFIX_PATH="$CMAKE_PREFIX_PATH:/eigen/path/under/conda"
+
+# Setup the eigen3 path properly 
+#sed -i '' "s#/usr/local/include/#$CONDA_PREFIX/include/#" bundlesdf/mycuda/setup.py (MacOS)
+sed -i "s#/usr/local/include/#$CONDA_PREFIX/include/#" bundlesdf/mycuda/setup.py  # Linux
 
 # install dependencies
 python -m pip install -r requirements.txt