diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 9373d9ab795f2b72fd1e53e6185eeb6b9f66a660..c25774b7368f503249a8710696ca7ae7b1ef14c0 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -2853,21 +2853,21 @@ class installer_base {
 
 			// This script is needed earlier to check and open http port 80 or standalone might fail
 			// Make executable and temporary symlink latest letsencrypt pre, post and renew hook script before install
-			if(file_exists(dirname(getcwd()) . '/server/scripts/letsencrypt_pre_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_pre_hook.sh')) {
-				symlink(dirname(getcwd()) . '/server/scripts/letsencrypt_pre_hook.sh', '/usr/local/bin/letsencrypt_pre_hook.sh');
+			if(file_exists(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_pre_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_pre_hook.sh')) {
+				symlink(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_pre_hook.sh', '/usr/local/bin/letsencrypt_pre_hook.sh');
+				chown('/usr/local/bin/letsencrypt_pre_hook.sh', 'root');
+				chmod('/usr/local/bin/letsencrypt_pre_hook.sh', 0700);
 			}
-			if(file_exists(dirname(getcwd()) . '/server/scripts/letsencrypt_post_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_post_hook.sh')) {
-				symlink(dirname(getcwd()) . '/server/scripts/letsencrypt_post_hook.sh', '/usr/local/bin/letsencrypt_post_hook.sh');
+			if(file_exists(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_post_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_post_hook.sh')) {
+				symlink(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_post_hook.sh', '/usr/local/bin/letsencrypt_post_hook.sh');
+				chown('/usr/local/bin/letsencrypt_post_hook.sh', 'root');
+				chmod('/usr/local/bin/letsencrypt_post_hook.sh', 0700);
 			}
-			if(file_exists(dirname(getcwd()) . '/server/scripts/letsencrypt_renew_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_renew_hook.sh')) {
-				symlink(dirname(getcwd()) . '/server/scripts/letsencrypt_renew_hook.sh', '/usr/local/bin/letsencrypt_renew_hook.sh');
+			if(file_exists(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_renew_hook.sh') && !file_exists('/usr/local/bin/letsencrypt_renew_hook.sh')) {
+				symlink(ISPC_INSTALL_ROOT . '/server/scripts/letsencrypt_renew_hook.sh', '/usr/local/bin/letsencrypt_renew_hook.sh');
+				chown('/usr/local/bin/letsencrypt_renew_hook.sh', 'root');
+				chmod('/usr/local/bin/letsencrypt_renew_hook.sh', 0700);
 			}
-			chown('/usr/local/bin/letsencrypt_pre_hook.sh', 'root');
-			chown('/usr/local/bin/letsencrypt_post_hook.sh', 'root');
-			chown('/usr/local/bin/letsencrypt_renew_hook.sh', 'root');
-			chmod('/usr/local/bin/letsencrypt_pre_hook.sh', 0700);
-			chmod('/usr/local/bin/letsencrypt_post_hook.sh', 0700);
-			chmod('/usr/local/bin/letsencrypt_renew_hook.sh', 0700);
 
 			// Check http port 80 status as it cannot be determined at post hook stage
 			$port80_status=exec('true &>/dev/null </dev/tcp/127.0.0.1/80 && echo open || echo close');