s/retriving/retrieving/
Signed-off-by: Dan Scott <dscott@laurentian.ca>
To perform certain developer tasks from a Git source code checkout,
additional packages may be required. As the *root* Linux account:
+
- * To install packages needed for retriving and managing web dependencies,
+ * To install packages needed for retrieving and managing web dependencies,
use the <osname>-developer Makefile.install target. Currently,
this is only needed for building and installing the (preview) browser
staff client.