I've successfully built LOS from source!: https://lisalist2.com/index.php/topic,644.0.html
DirNBlocks = 4;TYPE{$IFC MONITOR}IORsltWd = (INoError, IBadBlock, IBadUnit, IBadMode, ITimeOut,ILostUnit, ILostFile, IBadTitle, INoRoom, INoUnit,INoFile, IDupFile, INotClosed, INotOpen, IBadFormat,IStrgOvfl, IWrProt, IDevError, INoDirSpace);