added mpw-6a tag in makefile
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 0d580bf..9bcf741 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -171,9 +171,12 @@
 
     # set PDK_ROOT to the path you wish to use for the pdk
     export PDK_ROOT=<pdk-installation-path>
+    
+    # set the OPENLANE_ROOT to the openlane installation path
+    export OPENLANE_ROOT=<openlane-installation-path>
 
     # use volare to download the pdk
-    make pdk-with-volare -f $(OPENLANE_ROOT)/dependencies/tool_metadata.yml
+    make pdk-with-volare 
 
 Running Full Chip Simulation
 ============================