anchor.diff:              `pkg-config Qt5Multimedia --libs`,' \
         -i sys/unix/Makefile.src
       sed \
  +      -e 's,^CFLAGS=-g,CFLAGS=,' \
         -e 's,/bin/gzip,${gzip}/bin/gzip,g' \
         -e 's,^WINTTYLIB=.*,WINTTYLIB=-lncurses,' \
         -i sys/unix/hints/linux
  
positive.code: 
    makeFlags = [ "PREFIX=$(out)" ];
  
    patchPhase = ''
      sed -e '/^ *cd /d' -i sys/unix/nethack.sh
      sed \
        -e 's/^YACC *=.*/YACC = bison -y/' \
  
negative.code:       -e 's,^CC=.*$,CC=cc,' \
        -e 's,^HACKDIR=.*$,HACKDIR=\$(PREFIX)/games/lib/\$(GAME)dir,' \
        -e 's,^SHELLDIR=.*$,SHELLDIR=\$(PREFIX)/games,' \
        -e 's,^CFLAGS=-g,CFLAGS=,' \
        -i sys/unix/hints/macosx10.10
      sed -e '/define CHDIR/d' -i include/config.h
      sed \
  