bitbake

$ bitbake  core-image-x11 
Loading cache: 100% |################################################################################################################################################################################################################################################| ETA:  00:00:00
Loaded 1257 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION        = "1.22.0"
BUILD_SYS         = "x86_64-linux"
NATIVELSBSTRING   = "Ubuntu-14.04"
TARGET_SYS        = "x86_64-poky-linux"
MACHINE           = "genericx86-64"
DISTRO            = "poky"
DISTRO_VERSION    = "1.6.3"
TUNE_FEATURES     = "m64 core2"
TARGET_FPU        = ""
meta              
meta-yocto        
meta-yocto-bsp    = "daisy:39ec0738d4bdc566eca2724dc35c557955042242"
meta-lxde         = "master:6fdec5de935ff76b69cdfd5d90dd371565b84c41"

NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
ERROR: Unable to install packages. Command '/home/mani/hob/build/tmp/sysroots/x86_64-linux/usr/bin/apt-get  install --force-yes --allow-unauthenticated psplash packagegroup-core-x11-base apt dpkg packagegroup-base-extended packagegroup-core-boot' returned 100:
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 packagegroup-core-x11-base : Depends: matchbox-terminal but it is not going to be installed
                              Depends: matchbox-wm but it is not going to be installed
                              Depends: packagegroup-core-x11-xserver but it is not going to be installed
W: Ignoring Provides line with DepCompareOp for package pkgconfig__pkg-config__
W: You may want to run apt-get update to correct these problems
W: Unable to read /home/mani/hob/build/tmp/work/genericx86_64-poky-linux/core-image-x11/1.0-r0/apt/preferences.d/ - DirectoryExists (2: No such file or directory)
E: Unable to correct problems, you have held broken packages.

ERROR: Function failed: do_rootfs
ERROR: Logfile of failure stored in: /home/mani/hob/build/tmp/work/genericx86_64-poky-linux/core-image-x11/1.0-r0/temp/log.do_rootfs.4036
ERROR: Task 7 (/home/mani/hob/meta/recipes-graphics/images/core-image-x11.bb, do_rootfs) failed with exit code '1'
NOTE: Tasks Summary: Attempted 4092 tasks of which 4087 didn't need to be rerun and 1 failed.
No currently running tasks (4091 of 4094)

Summary: 1 task failed: