diff --git a/INSTALL.alta b/INSTALL.alta
index a126786ee..4dfff8d5b 100644
--- a/INSTALL.alta
+++ b/INSTALL.alta
@@ -10,7 +10,9 @@ To get SVN version, run:
 
 user@host:~$ svn co https://rts-2.svn.sf.net/svnroot/rts-2/apogee
 
-After that, run:
+Apogee drivers are a bit hairy. But do not worry, you need only apogee_USB.so
+file. For this build, you will need libusb-dev package (apt-get install
+libusb-dev). After installing libusb-dev, run following commands:
 
 user@host:~$ cd apogee
 user@host:~/apogee$ make apogee_USB.so