diff --git a/kdumpctl b/kdumpctl
index 3cad3dd..361bf51 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -1611,10 +1611,13 @@ reset_crashkernel()
 	fi
 }
 
-# to tell if it's package install other than upgrade
-_is_package_install()
+_is_bootloader_installed()
 {
-	[[ -f /tmp/kexec_tools_package_install ]]
+	if [[ $(uname -r) == s390x ]]; then
+		test -f /etc/zipl.conf
+	else
+		test -f /boot/grub2/grub.cfg
+	fi
 }
 
 # update the crashkernel value in GRUB_ETC_DEFAULT if necessary
@@ -1626,10 +1629,6 @@ update_crashkernel_in_grub_etc_default_after_update()
 	local _crashkernel _fadump_val
 	local _dump_mode _old_default_crashkernel _new_default_crashkernel
 
-	if _is_package_install; then
-		return
-	fi
-
 	if [[ $(uname -m) == s390x ]]; then
 		return
 	fi
@@ -1659,7 +1658,7 @@ reset_crashkernel_after_update()
 	local _kernel _crashkernel _dump_mode _fadump_val _old_default_crashkernel _new_default_crashkernel
 	declare -A _crashkernel_vals
 
-	if _is_package_install; then
+	if ! _is_bootloader_installed; then
 		return
 	fi
 
@@ -1715,7 +1714,7 @@ reset_crashkernel_for_installed_kernel()
 
 	# During package install, only try to reset crashkernel for osbuild
 	# thus to avoid calling grubby when installing os via anaconda
-	if _is_package_install && ! _is_osbuild; then
+	if ! _is_bootloader_installed && ! _is_osbuild; then
 		return
 	fi
 
diff --git a/kexec-tools.spec b/kexec-tools.spec
index 24fad76..1ee1770 100644
--- a/kexec-tools.spec
+++ b/kexec-tools.spec
@@ -268,11 +268,6 @@ if [ ! -f /run/ostree-booted ] && [ $1 == 2 ] && grep -q get-default-crashkernel
   kdumpctl get-default-crashkernel fadump > /tmp/old_default_crashkernel_fadump 2>/dev/null
 %endif
 fi
-# indicate it's package install so kdumpctl later will only reset crashkernel
-# value for osbuild.
-if [ $1 == 1 ]; then
-  touch /tmp/kexec_tools_package_install
-fi
 # don't block package update
 :