use ExtUtils::MakeMaker; WriteMakefile( NAME => 'IPC::Run3', VERSION_FROM => 'lib/IPC/Run3.pm', (eval { ExtUtils::MakeMaker->VERSION(6.21) } ? (LICENSE => 'open_source') : ()), EXE_FILES => [], PREREQ_PM => { 'Test::More' => 0.31, 'Time::HiRes' => 0, ($^O =~ /Win32/ ? (Win32 => 0) : ()) }, clean => { FILES => "t/test.txt" }, );