fix: [install] prevent installation of docker-compose when python >= 3.9 is present

bin/myc-install

@@ -111,15 +111,20 @@ EOF
 ##
 ## We could need some docker-compose for some quick hacks
 ##
-if ! type -p docker-compose >/dev/null; then
+version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; }
+
+if type -p python3 >/dev/null 2>&1 &&
+        ! version_gt $(python3 --version | cut -f 2 -d " ") 3.9 ; then
+    if ! type -p docker-compose >/dev/null; then
         # seems to require a C compiler
-    apt-get install -y build-essential  </dev/null &&
+        apt-get install -y build-essential libffi-dev </dev/null &&
             pip install wheel==0.33.6 &&
             pip install pip==19.3.1 cffi==1.12.3 subprocess32==3.5.4 texttable==1.6.2 \
                 pyrsistent==0.15.7 \
                 git+https://github.com/0k/compose@run_ignore_orphans || exit 1
         ## Bug after updating pip
         hash -d pip || exit 1
+    fi
 fi
 
 if [ "$DOMAIN" ]; then