Yes it is....

ha, ok:)

Because its configured that way, Config, installstyle, installprivlib, installvendorlib, installsitelib, ExtUtils::MakeMaker#INSTALLDIRS, https://metacpan.org/module/RJBS/perl-5.18.1/INSTALL
http://p3rl.org/INSTALL#Installation-Directories
http://p3rl.org/INSTALL#Relocatable-INC
https://metacpan.org/module/INSTALL#Coexistence-with-earlier-versions-of-perl-5

Me, I use the easy way these days , unarched, unversioned 

$ perl "-V:install.*"
installarchlib='C:\citrusperl\lib';
installbin='C:\citrusperl\bin';
installhtml1dir='';
installhtml3dir='';
installhtmldir='C:\citrusperl\html';
installhtmlhelpdir='';
installman1dir='';
installman3dir='';
installprefix='C:\citrusperl';
installprefixexp='C:\citrusperl';
installprivlib='C:\citrusperl\lib';
installscript='C:\citrusperl\bin';
installsitearch='C:\citrusperl\site\lib';
installsitebin='C:\citrusperl\site\bin';
installsitehtml1dir='';
installsitehtml3dir='';
installsitelib='C:\citrusperl\site\lib';
installsiteman1dir='';
installsiteman3dir='';
installsitescript='C:\citrusperl\site\bin';
installstyle='lib';
installusrbinperl='undef';
installvendorarch='C:\citrusperl\vendor\lib';
installvendorbin='C:\citrusperl\vendor\bin';
installvendorhtml1dir='';
installvendorhtml3dir='';
installvendorlib='C:\citrusperl\vendor\lib';
installvendorman1dir='';
installvendorman3dir='';
installvendorscript='C:\citrusperl\vendor\bin';

[download]

Compare to the (simple) versioned/arched style 

 $ C:\perl\5.14.1\bin\MSWin32-x86-multi-thread\perl.EXE  "-V:install.*
+"
installarchlib='c:\perl\5.14.1\lib\MSWin32-x86-multi-thread';
installbin='c:\perl\5.14.1\bin\MSWin32-x86-multi-thread';
installhtml1dir='';
installhtml3dir='';
installhtmldir='';
installhtmlhelpdir='';
installman1dir='';
installman3dir='';
installprefix='c:\perl\5.14.1';
installprefixexp='c:\perl\5.14.1';
installprivlib='c:\perl\5.14.1\lib';
installscript='c:\perl\5.14.1\bin';
installsitearch='c:\perl\site\5.14.1\lib\MSWin32-x86-multi-thread';
installsitebin='c:\perl\5.14.1\bin\MSWin32-x86-multi-thread';
installsitehtml1dir='';
installsitehtml3dir='';
installsitelib='c:\perl\site\5.14.1\lib';
installsiteman1dir='';
installsiteman3dir='';
installsitescript='c:\perl\site\5.14.1\bin';
installstyle='lib';
installusrbinperl='undef';
installvendorarch='';
installvendorbin='';
installvendorhtml1dir='';
installvendorhtml3dir='';
installvendorlib='';
installvendorman1dir='';
installvendorman3dir='';
installvendorscript='';

[download]

In reply to Re^7: Why does PERL5LIB need to be so verbose? (installstyle sitelib installlib vendorlib INST_ARCH INST_VER userelocatableinc @INC) by Anonymous Monk
in thread Why does PERL5LIB need to be so verbose? by kiz

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