diff --git a/util/install.sh b/util/install.sh
index 0a67871..7076dbe 100755
--- a/util/install.sh
+++ b/util/install.sh
@@ -5,6 +5,7 @@
 
 # Fail on error
 set -e
+set -x
 
 # Fail on unset var usage
 set -o nounset
@@ -174,15 +175,16 @@ function mn_deps {
                         python-pep8 ${PYPKG}-pexpect ${PYPKG}-tk
     else  # Debian/Ubuntu
         pf=pyflakes
-        # Starting around 20.04, installing pyflakes instead of pyflakes3
+        # Starting around 18.04, installing pyflakes instead of pyflakes3
         # causes Python 2 to be installed, which is exactly NOT what we want.
-        if [ `expr $RELEASE '>=' 20.04` = "1" ]; then
+        if [ `expr $RELEASE '>=' 18.04` = "1" ]; then
                 pf=pyflakes3
         fi
         $install gcc make socat psmisc xterm ssh iperf telnet \
-                 ethtool help2man $pf pylint pep8 \
+                 ethtool help2man pylint3 pep8 \
                  net-tools \
                  ${PYPKG}-pexpect ${PYPKG}-tk
+        $install --no-install-recommends $pf
         # Install pip
         $install ${PYPKG}-pip || $install ${PYPKG}-pip-whl
         if ! ${PYTHON} -m pip -V; then
