anchor.diff:      ./path-to-cat.patch
     ];
   
  -  doCheck = true;
     enableParallelBuilding = false;
     hardeningDisable = [ "format" ];
   
  
positive.code:     # Provide libraries for mhn.
      export LD_LIBRARY_PATH=$(pwd)/lib/.libs
    '';
    postCheck = ''
      unset LD_LIBRARY_PATH
    '';
  
negative.code:     sha256 = "0zh7xn8yvnw9zkc7gi5290i34viwxp1rn0g1q9nyvmckkvk59lwn";
    };
  
    postPatch = ''
      sed -i -e '/chown root:mail/d' \
             -e 's/chmod [24]755/chmod 0755/' \
        */Makefile{.in,.am}
      sed -i 's:/usr/lib/mysql:${mysql.connector-c}/lib/mysql:' configure.ac
      sed -i 's/0\.18/0.19/' configure.ac
      sed -i -e 's:mysql/mysql.h:mysql.h:' \
             -e 's:mysql/errmsg.h:errmsg.h:' \
        sql/mysql.c
    '';
  
    nativeBuildInputs = [
      autoreconfHook gettext pkgconfig
    ];
  
    buildInputs = [
      gdbm pam readline ncurses gnutls guile texinfo gnum4 sasl fribidi nettools
      gss mysql.connector-c python
  