diff --git a/setup/so-functions b/setup/so-functions
index 491d9e631..c62322cc1 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -958,6 +958,7 @@ detect_os() {
 			is_centos=true
 			is_rpm=true
 			not_supported=true
+			unset is_supported
 		elif grep -q "Red Hat Enterprise Linux release 9" /etc/redhat-release; then
 			if [ -f /etc/oracle-release ]; then
 				OS=oracle
@@ -971,6 +972,7 @@ detect_os() {
 				is_rhel=true
 				is_rpm=true
 				not_supported=true
+				unset is_supported
 			fi
 		fi
 	elif [ -f /etc/os-release ]; then
@@ -980,6 +982,7 @@ detect_os() {
 			OS=ubuntu
 			is_ubuntu=true
 			not_supported=true
+			unset is_supported
 		elif grep -q "UBUNTU_CODENAME=jammy" /etc/os-release; then
 			OSVER=jammy
 			UBVER=22.04
@@ -987,6 +990,7 @@ detect_os() {
 			is_ubuntu=true
 			is_deb=true
 			not_supported=true
+			unset is_supported
 		elif grep -q "VERSION_CODENAME=bookworm" /etc/os-release; then
 			OSVER=bookworm
 			DEBVER=12
@@ -994,6 +998,7 @@ detect_os() {
 			OS=debian
 			is_deb=true
 			not_supported=true
+			unset is_supported
 		fi
 		installer_prereq_packages