make install
    make alone puts all relevant files into directories that are named by
    the macros INST_LIB, INST_ARCHLIB, INST_SCRIPT, INST_MAN1DIR and
    INST_MAN3DIR. All these default to something below ./blib if you are
    *not* building below the perl source directory. If you *are* building
    below the perl source, INST_LIB and INST_ARCHLIB default to ../../lib,
    and INST_SCRIPT is not defined.

    The *install* target of the generated Makefile copies the files found
    below each of the INST_* directories to their INSTALL* counterparts.
    Which counterparts are chosen depends on the setting of INSTALLDIRS
    according to the following table:

                                     INSTALLDIRS set to
                               perl        site          vendor

                     PERLPREFIX      SITEPREFIX          VENDORPREFIX
      INST_ARCHLIB   INSTALLARCHLIB  INSTALLSITEARCH     INSTALLVENDORARCH
      INST_LIB       INSTALLPRIVLIB  INSTALLSITELIB      INSTALLVENDORLIB
      INST_BIN       INSTALLBIN      INSTALLSITEBIN      INSTALLVENDORBIN
      INST_SCRIPT    INSTALLSCRIPT   INSTALLSITESCRIPT   INSTALLVENDORSCRIPT
      INST_MAN1DIR   INSTALLMAN1DIR  INSTALLSITEMAN1DIR  INSTALLVENDORMAN1DIR
      INST_MAN3DIR   INSTALLMAN3DIR  INSTALLSITEMAN3DIR  INSTALLVENDORMAN3DIR

    The INSTALL... macros in turn default to their %Config
    ($Config{installprivlib}, $Config{installarchlib}, etc.) counterparts.

    You can check the values of these variables on your system with

        perl '-V:install.*'