diff --git a/bin/polynum-build-virtualenv b/bin/polynum-build-virtualenv
index 08c198d..3ca07f8 100755
--- a/bin/polynum-build-virtualenv
+++ b/bin/polynum-build-virtualenv
@@ -32,6 +32,11 @@ cd $VE
 pip $PIPOPT install -U pip
 pip $PIPOPT install --requirement=/usr/share/doc/polynum/requirements
 
+echo ""
+echo -n "Creating .pyc files (compileall) .."
+python -m compileall -f -q $VEDIR
+echo "..done"
+
 echo ""
 echo "PolyNum virtualenv created in $VEDIR"
 echo ""
diff --git a/debian/postinst b/debian/postinst
index 86ab806..a157564 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -96,6 +96,13 @@ case "$1" in
             chmod u=rwx,g=rx,o= $PIDDIR
             echo "..done"
         fi
+        echo -n "Creating .pyc files [ "
+        for pydir in polynum bin virtualenv
+        do
+            echo -n "$POLYNUM_HOME/$pydir "
+            python -m compileall -f -q $POLYNUM_HOME/$pydir
+        done
+        echo "] done"
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)