diff --git a/build/installer/MEGAcmd.sh b/build/installer/MEGAcmd.sh
index 230bc0da..dc6e02fa 100755
--- a/build/installer/MEGAcmd.sh
+++ b/build/installer/MEGAcmd.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 /Applications/MEGAcmd.app/Contents/MacOS/mega-cmd &
-sleep 2
+sleep 1
 osascript -e 'tell app "Terminal" to do script "/Applications/MEGAcmd.app/Contents/MacOS/MEGAcmdShell;exit" activate'
diff --git a/build/megacmd/debian.compat b/build/megacmd/debian.compat
index ec635144..301160a9 100644
--- a/build/megacmd/debian.compat
+++ b/build/megacmd/debian.compat
@@ -1 +1 @@
-9
+8
\ No newline at end of file
diff --git a/build/megacmd/debian.prerm b/build/megacmd/debian.prerm
index e1a8247b..769e8abf 100644
--- a/build/megacmd/debian.prerm
+++ b/build/megacmd/debian.prerm
@@ -1,3 +1,14 @@
 #!/bin/bash
 
-[ "$1" == "upgrade" ] && killall -s SIGUSR1 mega-cmd-server 2> /dev/null || true
+# Check if the first argument is "upgrade" and if mega-cmd-server is running
+if [ "$1" == "upgrade" ]; then
+    # Attempt to gracefully upgrade mega-cmd-server by sending SIGUSR1
+    if pgrep mega-cmd-server >/dev/null; then
+        killall -s SIGUSR1 mega-cmd-server 2> /dev/null
+        echo "Sent SIGUSR1 to mega-cmd-server for upgrade."
+    else
+        echo "mega-cmd-server is not running."
+    fi
+else
+    echo "Usage: $0 upgrade"
+fi