Fix installer

script-install-motd

@@ -1,8 +1,11 @@
 #!/usr/bin/env bash
 # Install motd scripts
+# Bryan C. Roessler
 
-# shellcheck source=./functions
-[[ -f functions ]] && . functions || exit 1
+parent="${BASH_SOURCE[0]}"
+parent=${parent%/*}
+
+[[ -f "$parent"/functions ]] && . "$parent"/functions || exit 1
 
 is_root