diff --git a/KLayout-Python-Module-Prototype.md b/KLayout-Python-Module-Prototype.md
index 3ce6988..ae16587 100644
--- a/KLayout-Python-Module-Prototype.md
+++ b/KLayout-Python-Module-Prototype.md
@@ -5,7 +5,28 @@ Binary packages and documentation for the branch are available here: [http://www
 
 ## Building
 
-The `klayout` module will be built together with KLayout. After KLayout installation, the `klayout` module resides inside the installation tree. To use it, either copy the `klayout` folder to your Python installation or set `PYTHONPATH` to the location of the `klayout` folder.
+For building use the build script:
+
+```
+# From the project's root directory
+./build.sh -bin <your-installation-path> 
+```
+
+For "<your-installation-path>" pick a destination where you want KLayout to be installed. For example you can use "/usr/local/klayout" for the destination, but you will need sudo permissions then:
+
+```
+# Build and install in /usr/local/klayout
+sudo ./build.sh -bin /usr/local/klayout
+```
+
+The `klayout` module will be built together with KLayout. After KLayout installation, the `klayout` module resides inside the installation tree in the "pymod" subfolder. To use it, either copy the `klayout` folder to your Python installation or set `PYTHONPATH` to the location of the `klayout` folder:
+
+```
+export PYTHONPATH=<your-installation-path>/pymod
+python
+>>> import klayout.db as db
+>>> print(str(db.DBox(0, 0, 100, 200))
+```
 
 ## Using the module