catchunks: get rid of the last few remaining uses of Selectors

Refs: #4556
Change-Id: Ibe0e909c21b57aaa47c325bdef5852cb5e38482b
diff --git a/INSTALL.md b/INSTALL.md
index a527086..5ebf050 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -8,18 +8,16 @@
    Please see [Getting Started with ndn-cxx](https://named-data.net/doc/ndn-cxx/current/INSTALL.html)
    for how to install ndn-cxx.
    Note: If you have installed ndn-cxx from a binary package, please make sure development headers
-   are installed (if using Ubuntu PPA, `ndn-cxx-dev` package is needed).
+   are installed (if using Ubuntu PPA, `libndn-cxx-dev` package is needed).
 
    Any operating system and compiler supported by ndn-cxx is supported by ndn-tools.
 
--  ``libpcap``
+-  `libpcap`
 
     Comes with the base system on macOS.
 
     On Ubuntu:
 
-    ::
-
         sudo apt-get install libpcap-dev
 
 ## Build Steps