Default "No space left" but 94.5GB is free


I'm building CM for my Xperia J, almost finished but I have this stupid error:

Package target files: /home/lozohcum/CM/out/target/product/jlo/obj/PACKAGING/target_files_intermediates/
Package OTA: /home/lozohcum/CM/out/target/product/jlo/
MKBOOTIMG=device/sony/tamsui-common/ \
	device/sony/tamsui-common/releasetools/semc_ota_from_target_files -v \
	   -p /home/lozohcum/CM/out/host/linux-x86 \
	   -k build/target/product/security/testkey \
	   --backup=true \
	   --override_device=ST26i,ST26a,jlo \
	   /home/lozohcum/CM/out/target/product/jlo/obj/PACKAGING/target_files_intermediates/ /home/lozohcum/CM/out/target/product/jlo/
unzipping target target-files...
  running:  unzip -o -q /home/lozohcum/CM/out/target/product/jlo/obj/PACKAGING/target_files_intermediates/ -d /tmp/targetfiles-ttBFcz
/tmp/targetfiles-ttBFcz/SYSTEM/lib/  write error (disk full?).  Continue? (y/n/^C) y
The problem is that I actually have 94.5GB free on my /home

/home is on different partition that ubuntu itself.

I have the strange feeling that CM build script is trying to build CM on my system partition where I had my home in past but it would be nonsense