diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7777554b2..ae8d8c625 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -32,6 +32,8 @@ why we ask this as well as instructions for how to proceed, see the
   ./configure
   make
   make install
+  # Optionally, you might instead want to use `make install-all`
+  # since `multi_extension` regression test would fail due to missing downgrade scripts.
   cd src/test/regress
   make check
   ```
@@ -51,7 +53,7 @@ why we ask this as well as instructions for how to proceed, see the
                           autoconf flex git libcurl4-gnutls-dev libicu-dev \
                           libkrb5-dev liblz4-dev libpam0g-dev libreadline-dev \
                           libselinux1-dev libssl-dev libxslt1-dev libzstd-dev \
-                          make uuid-dev
+                          make uuid-dev mitmproxy
   ```
 
 2. Get, build, and test the code
@@ -62,6 +64,8 @@ why we ask this as well as instructions for how to proceed, see the
   ./configure
   make
   sudo make install
+  # Optionally, you might instead want to use `sudo make install-all`
+  # since `multi_extension` regression test would fail due to missing downgrade scripts.
   cd src/test/regress
   make check
   ```
@@ -104,6 +108,8 @@ why we ask this as well as instructions for how to proceed, see the
   PG_CONFIG=/usr/pgsql-14/bin/pg_config ./configure
   make
   sudo make install
+  # Optionally, you might instead want to use `sudo make install-all`
+  # since `multi_extension` regression test would fail due to missing downgrade scripts.
   cd src/test/regress
   make check
   ```
@@ -125,6 +131,8 @@ cd build
 cmake ..
 make -j5
 sudo make install
+# Optionally, you might instead want to use `sudo make install-all`
+# since `multi_extension` regression test would fail due to missing downgrade scripts.
 cd ../..
 
 git clone https://github.com/citusdata/tools.git