fix: made the installation file work on freebsd

Fixes #713

scripts/utils.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 do_install() {
 	local GTKDIR GTK320DIR GTKVER INSTALL_DIR
@@ -12,23 +12,24 @@ do_install() {
 
 	cp index.theme "${INSTALL_DIR}"
 
-	cp -rt "${INSTALL_DIR}" \
-			assets gtk-2.0 metacity-1 openbox-3 xfce-notify-4.0 xfwm4 unity
+	cp -r assets gtk-2.0 metacity-1 openbox-3 xfce-notify-4.0 xfwm4 unity \
+              "${INSTALL_DIR}"/
 
 	for _DIR in "${GTKDIR}" "${GTK320DIR}"
 	do
 		GTKVER="${_DIR##*/}"
 
 		mkdir -p "${_DIR}"
 
-		cp -t "${_DIR}" \
+		cp \
 			"${GTKVER}/gtk.css" \
 			"${GTKVER}/gtk-dark.css" \
 			"${GTKVER}/gtk.gresource" \
-			"${GTKVER}/thumbnail.png"
+			"${GTKVER}/thumbnail.png" \
+                        "${_DIR}"
 
 		cd "${_DIR}"
-		ln -srf ../assets assets
+		ln -sf ../assets assets
 		cd -
 	done
 }