Error installing package cakephp/cakephp and some others

[ptica]

• [x] bug
• CakePHP Application Skeleton Version: f7f5e46684527cbdbf34f295c1cdef9c62e253a7.zip
• Platform and Target: apache2 @ osx @ mysql

What I did

I've filled in my composer path obtained by which composer I did autoupdate on him just before running oven.php

What happened

some of the packages are installed ok, some not:

if I change the owner of app dir from _www to my own user, then I delete the composer.lock file and run composer require cakephp/cakephp:~3.4-stable by hand, it installs ok:

Jane2:...~/src/vd/app > composer require cakephp/cakephp:~3.4-stable
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 5 installs, 0 updates, 0 removals
  - Installing psr/http-message (1.0.1): Loading from cache
  - Installing zendframework/zend-diactoros (1.3.10): Downloading (100%)
  - Installing aura/intl (3.0.0): Downloading (100%)
  - Installing cakephp/chronos (1.1.1): Downloading (100%)
  - Installing cakephp/cakephp (3.4.4): Downloading (100%)
cakephp/cakephp suggests installing lib-ICU (The intl PHP library, to use Text::transliterate() or Text::slug())
Writing lock file
Generating autoload files