=> "/opt/local/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-trunk-x86_64/games/gnuchess-book", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
===> Building for gnuchess-book-1.02nb1
cd /tmp/work/games/gnuchess-book/work && /opt/local/bin/gnuchess -a book_1.02.pgn </dev/null
GNU Chess
White (1) : inserting games ...