diff --git a/scripts/build-and-push.sh b/scripts/build-and-push.sh
index a901c51..fc61487 100755
--- a/scripts/build-and-push.sh
+++ b/scripts/build-and-push.sh
@@ -134,6 +134,9 @@ resolve_ssh_alias() {
   local -a patterns
   # Force whitespace-aware splitting (the script's global IFS excludes spaces).
   local IFS=$' \t\n'
+  # SSH config directives are case-insensitive (HostName == Hostname == HOSTNAME).
+  # nocasematch is supported in bash 3.2 (unlike ${var,,} which needs 4+).
+  shopt -s nocasematch
   while read -r line || [[ -n "$line" ]]; do
     # First whitespace-separated token (tabs and spaces collapse uniformly).
     read -r first _ <<< "$line"
@@ -163,6 +166,7 @@ resolve_ssh_alias() {
       esac
     fi
   done < "$config"
+  shopt -u nocasematch
 
   (( in_block )) \
     || die "No matching Host entry in $config for alias '$alias'. Use user@host[:port] or check ~/.ssh/config."