package my_config;

action {
    id      'svninfo';
    desc    'svn working copy information';
    cmdline 'svn info';
    workdir '';
    logfile 'minbld_svninfo.log';
    tee     1;
    prompt  0;
    run     1;
};

action {
    id      'svnup';
    desc    'Run full svn update';
    cmdline 'svn update';
    workdir '';
    logfile 'minbld_svnupdate.log';
    tee     1;
    prompt  0;
    run     1;
};
# ...

##</code><code>##

default workdir => '';

# or
default {
   workdir '';
}

# or just a top-level setting
workdir '';


action { 
  # workdir can be missing now
}