Custom ROM Turkcell T50 için CyanogenMod 12.1 derlerken hata veriyor

Which would you like? [aosp_arm-eng] cm_turkcellt50-userdebug
build/core/config.mk:462: *** Error: could not find jdk tools.jar, please check if your JDK was installed correctly.  Stop.
Device turkcellt50 not found. Attempting to retrieve device repository from CyanogenMod Github (http://github.com/CyanogenMod).
Repository for turkcellt50 not found in the CyanogenMod Github repository list. If this is in error, you may need to manually add it to your local_manifests/roomservice.xml.
build/core/config.mk:462: *** Error: could not find jdk tools.jar, please check if your JDK was installed correctly.  Stop.

** Don't have a product spec for: 'cm_turkcellt50'
** Do you have the right repo manifest?