#! perl
use v5.12;

say s! ( ?<= \\ install ) _ .+? ( ?= \\ ) !!rx
    for 'D:\ostore_7.3.0_tfix_bld\install_temp\OStore\bin\os_coll.adb',
        'D:\ostore_7.3.0_tfix_bld\install_patch\osji\lib\osjiload.ldb';