Index: web/protocol/README
===================================================================
--- web/protocol/README	(revision 4743)
+++ web/protocol/README	(revision 4744)
@@ -2,9 +2,13 @@
 Running unit tests manually
 ---------------------------
 
-Before you can run the tests you need to install node.js v4.x.x or higher.
-node v6.x.x is recommended.
+Preconditions:
+- node.js v4.x.x or higher (v6.x.x is recommended)
+- npm package manager
 
+On Debian-based distributions you may want to install the `nodejs-legacy`
+package that symlinks `nodejs` to its more common name `node`.
+
 The next step is the installation of package dependencies.
 Go to the protocol directory and execute the following command:
 
@@ -13,7 +17,7 @@
 This will download and install all normal and dev dependencies as they are
 defined in package.json.
 All dependencies are installed into the node_modules subdirectory.
-After successful installation you can run unit tests any time by typing:
+After successful installation you can run unit tests by typing:
 
 npm test
 
@@ -25,4 +29,4 @@
 ---------------
 
 The node_modules subdirectory can be deleted manually.
-No other artifects are created.
+No other artifacts are created.