diff --git a/debian-8/scripts/base.sh b/debian-8/scripts/base.sh
index 97ba795..b3995d2 100644
--- a/debian-8/scripts/base.sh
+++ b/debian-8/scripts/base.sh
@@ -17,7 +17,7 @@
 apt-get autoremove --purge
 
 # Useful tools
-apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop
+apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree
 
 # Tmux fixes
 cat << 'EOF' >> /etc/tmux.conf
diff --git a/ubuntu-14.04/scripts/base.sh b/ubuntu-14.04/scripts/base.sh
index b0d0fa7..256da57 100644
--- a/ubuntu-14.04/scripts/base.sh
+++ b/ubuntu-14.04/scripts/base.sh
@@ -1,6 +1,6 @@
 ## Base packages and setup
-# Remove unwanted ubuntu security repository
-sed -i '/.*security\.ubuntu.com.*/d' /etc/apt/sources.list
+# Ensure our repository is the only one present
+echo "deb [arch=amd64] http://apt.tcpcloud.eu/nightly/ trusty main security extra tcp tcp-salt" > /etc/apt/sources.list
 
 echo "exit 101" > /usr/sbin/policy-rc.d
 chmod +x /usr/sbin/policy-rc.d
@@ -23,7 +23,7 @@
 apt-get autoremove --purge
 
 # Useful tools
-apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop
+apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree
 
 # Tmux fixes
 cat << 'EOF' >> /etc/tmux.conf
diff --git a/ubuntu-16.04/scripts/base.sh b/ubuntu-16.04/scripts/base.sh
index 5c4c20d..764943f 100644
--- a/ubuntu-16.04/scripts/base.sh
+++ b/ubuntu-16.04/scripts/base.sh
@@ -23,7 +23,7 @@
 apt-get autoremove --purge
 
 # Useful tools
-apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop
+apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree
 
 # Tmux fixes
 cat << 'EOF' >> /etc/tmux.conf