not install BA

hugo/content/installation/building/unix/build-and-install.md

@@ -23,6 +23,10 @@ $ cd build
 $ cmake [<options>] ..
 $ make -j4
 $ ctest -j4
+```
+
+The last step, which should be done *only* for linheinz and libformfactor:
+```bash
 $ sudo make install
 ```
 
@@ -110,7 +114,7 @@ in parallel. Every test contains the simulation of a typical sample
 and compares the result with a reference file. Having `100% tests
 passed` ensures that your local installation is correct.
 
-#### Installing the framework
+#### Installing linheinz and libformfactor
 
 ```bash
 $ sudo make install