File _constraints of Package racket
<?xml version="1.0"?> <constraints> <hardware> <processors>4</processors> <memory> <size unit="G">4</size> </memory> </hardware> </constraints>
<?xml version="1.0"?> <constraints> <hardware> <processors>4</processors> <memory> <size unit="G">4</size> </memory> </hardware> </constraints>