[G2 and Desire Z Q&A, Help & Troubleshooting] crowstar:
TO shamelessly copy my thread in the chef section:

Rather than try to explain what the issue is, here is the error message from a

make -j6 otapackage

build/core/base_rules.mk:73: unusual tags eng,debug on su at system/su
build/core/Makefile:21: warning: overriding commands for target `out/target/product/vision/obj/lib/libaudio.so'
build/core/dynamic_binary.mk:141: warning: ignoring old commands for target `out/target/product/vision/obj/lib/libaudio.so'
build/core/Makefile:21: warning: overriding commands for target `out/target/product/vision/system/lib/libaudio.so'
build/core/base_rules.mk:479: warning: ignoring old commands for target `out/target/product/vision/system/lib/libaudio.so'
build/core/Makefile:21: warning: overriding commands for target `out/target/product/vision/system/usr/keychars/qwerty2.kcm.bin'
build/core/base_rules.mk:479: warning: ignoring old commands for target `out/target/product/vision/system/usr/keychars/qwerty2.kcm.bin'
build/core/Makefile:21: warning: overriding commands for target `out/target/product/vision/system/usr/keychars/qwerty.kcm.bin'
build/core/base_rules.mk:479: warning: ignoring old commands for target `out/target/product/vision/system/usr/keychars/qwerty.kcm.bin'
No private recovery resources for TARGET_DEVICE vision
Header: out/target/product/vision/obj/include/librpc/rpc/clnt.h
Header: out/target/product/vision/obj/include/librpc/rpc/pmap_clnt.h
Header: out/target/product/vision/obj/include/librpc/rpc/rpc.h
Header: out/target/product/vision/obj/include/librpc/rpc/rpc_router_ioctl.h
Header: out/target/product/vision/obj/include/librpc/rpc/svc.h
Header: out/target/product/vision/obj/include/librpc/rpc/types.h
Header: out/target/product/vision/obj/include/librpc/rpc/xdr.h
Header: out/host/linux-x86/obj/include/libexpat/expat.h
Header: out/host/linux-x86/obj/include/libexpat/expat_external.h
Header: out/target/product/vision/obj/include/libexpat/expat.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_api_cb.h
Header: out/target/product/vision/obj/include/libexpat/expat_external.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_api_common.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_api.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_api_fixup.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_apicb_appinit.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/debug.h
Header: out/target/product/vision/obj/include/libloc_api-rpc/inc/loc_api_rpc_glue.h
Header: out/host/linux-x86/obj/include/libpng/pngconf.h
Header: out/host/linux-x86/obj/include/libpng/png.h
Header: out/host/linux-x86/obj/include/libpng/pngusr.h
Header: out/target/product/vision/obj/include/libpng/png.h
Header: out/target/product/vision/obj/include/libpng/pngconf.h
Header: out/target/product/vision/obj/include/libwpa_client/wpa_ctrl.h
Header: out/target/product/vision/obj/include/libpng/pngusr.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Audio.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Component.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_ContentPipe.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Core.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Index.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Image.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_IVCommon.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_QCOMExtns.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Other.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Types.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/OMX_Video.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/qc_omx_common.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/qc_omx_component.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/qc_omx_msg.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/QOMX_AudioExtensions.h
Header: out/target/product/vision/obj/include/mm-core/omxcore/QOMX_AudioIndexExtensions.h
Header: out/target/product/vision/obj/include/libsonivox/eas.h
Header: out/target/product/vision/obj/include/libsonivox/eas_types.h
Header: out/target/product/vision/obj/include/libsonivox/eas_reverb.h
Header: out/target/product/vision/obj/include/libsonivox/jet.h
Header: out/target/product/vision/obj/include/libsonivox/ARM_synth_constants_gnu.inc
Notice file: system/core/libmincrypt/NOTICE -- out/host/linux-x86/obj/NOTICE_FILES/src//lib/libmincrypt.a.txt
Directory: out/target/product/vision/root/sbin
Directory: out/target/product/vision/root/dev
Directory: out/target/product/vision/root/proc
Directory: out/target/product/vision/root/sys
Directory: out/target/product/vision/root/system
Directory: out/target/product/vision/root/data
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-gcc -mthumb-interwork -Ibionic/libc/private -o out/target/product/vision/obj/lib/crtbegin_static.o -c bionic/libc/arch-arm/bionic/crtbegin_static.S
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-gcc -mthumb-interwork -Ibionic/libc/private -o out/target/product/vision/obj/lib/crtbegin_so.o -c bionic/libc/arch-arm/bionic/crtbegin_so.S
Notice file: external/elfcopy/NOTICE -- out/host/linux-x86/obj/NOTICE_FILES/src//lib/libelfcopy.a.txt
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-gcc -mthumb-interwork -Ibionic/libc/private -o out/target/product/vision/obj/lib/crtend_so.o -c bionic/libc/arch-arm/bionic/crtend_so.S
Notice file: system/core/init/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//root/init.txt
Notice file: bionic/libc/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libc.so.txt
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-gcc -mthumb-interwork -Ibionic/libc/private -o out/target/product/vision/obj/lib/crtend_android.o -c bionic/libc/arch-arm/bionic/crtend.S
Notice file: bionic/libdl/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libdl.so.txt
Notice file: bionic/libc/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libc_common.a.txt
Notice file: bionic/libstdc++/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libstdc++.so.txt
Notice file: bionic/libm/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libm.so.txt
Notice file: system/core/liblog/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/liblog.a.txt
Notice file: system/core/libcutils/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libcutils.a.txt
Notice file: bionic/libc/NOTICE -- out/target/product/vision/obj/NOTICE_FILES/src//system/lib/libc.a.txt
Target buildinfo: out/target/product/vision/root/default.prop
make: *** No rule to make target `out/target/product/vision/obj/STATIC_LIBRARIES/librebootrecovery_intermediates/librebootrecovery.a', needed by `out/target/product/vision/obj/EXECUTABLES/recovery_intermediates/LINKED/recovery'. Stop.
make: *** Waiting for unfinished jobs....
Notice file: external/zlib/NOTICE -- out/host/linux-x86/obj/NOTICE_FILES/src//bin/minigzip.txt
Notice file: external/zlib/NOTICE -- out/host/linux-x86/obj/NOTICE_FILES/src//lib/libz.a.txt

long ass error, but i have no idea which part is the problem.

Thanks in advance ;)