===> Returning to build of virtualbox-3.0.51.r22acpi0_check: npx0 attached
===> virtualbox-3.0.51.r22902_3 depends on file: /usr/local/bin/easy_instaacpi0_check: acpi0 busy
===> virtualbox-3.0.51.r22902_3 depends on file: /usr/local/bin/python2.6 - found
===> virtualbox-3.0.51.r22902_3 depends on file: /usr/local/libdata/pkgconfig/xcursor.pc - found
===> virtualbox-3.0.51.r22902_3 depends on file: /usr/local/libdata/pkgconfig/xmu.pc - found
===> virtualbox-3.0.51.r22902_3 depends on package: qt4-gui>=4.5.3 - not found
===> Found qt4-gui-4.5.2_1, but you need to upgrade to qt4-gui>=4.5.3.
*** Error code 1
Stop in /usr/ports/emulators/virtualbox.
*** Error code 1
Stop in /usr/ports/emulators/virtualbox.
*** Error code 1
Stop in /usr/ports/emulators/virtualbox.