diff --git a/GeoModelXML/README.md b/GeoModelXML/README.md
index c7196ac91a20bee4af17ca147f78352ff489fd3e..d29809099f281c08518fce4acac593c7633adf08 100644
--- a/GeoModelXML/README.md
+++ b/GeoModelXML/README.md
@@ -13,15 +13,24 @@ https://twiki.atlas-canada.ca/pub/AtlasCanada/ITk/gmx2geo.pdf
 ## How to build it
 
 If `GeoModel` is installed:
+
 ```
+# Clone
 git clone ssh://git@gitlab.cern.ch:7999/atlas/geomodelatlas/GeoModelATLAS.git
+
+# Configure, build, install locally:
 mkdir build_geomodelatlas; cd build_geomodelatlas
 cmake -DCMAKE_INSTALL_PREFIX=../install/ -DGEOMODELATLAS_BUILD_GEOMODELXML=1 ../GeoModelATLAS
 make
 make install
+
+# EXTRA STEP: Add a rpath, only needed when using a local 'install' folder 
+install_name_tool -add_rpath ../install/lib ../install/lib/libGMXPlugin.dylib
+
 cd ..
 ```
 
+
 ## How to run it
 
 Running the GMXPlugin executes the xerces parser to parse the xml file. The expression evaluator only works if the system language is set to USEnglish, thus do:
@@ -33,7 +42,7 @@ From e.g. your home directory
 
 ```
 cd install
-export GMX_FILES="../GeoModelATLAS/GeoModelXml/data/example1.xml"
+export GMX_FILES="../GeoModelATLAS/GeoModelXML/data/example1.xml"
 bin/gmex lib/libGMXPlugin.1.0.0.dylib (or .so on Linux)
 ```