laz-doublcmd/install/linux/pkg/environmentoptions.xml

<?xml version="1.0" encoding="UTF-8"?>
<CONFIG>
  <EnvironmentOptions>
    <CompilerFilename Value="fpc"/>
    <LazarusDirectory Value="/usr/lib/lazarus"/>
    <FPCSourceDirectory Value="/usr/lib/fpc/src"/>
  </EnvironmentOptions>
</CONFIG>