no rule to make target '/.txt'

hey guys! I'm doing a test compile of CM, just trying to get it running on the Raspberry Pi 2 for kicks, and I ran into a compile issue:

Code:

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Install: /out/host/linux-x86/bin/apicheck
Checking API: checkpublicapi-last
Checking API: checkpublicapi-current
Docs droiddoc: /out/target/common/docs/system-api-stubs
DroidDoc took 14 sec. to write docs to /out/target/common/docs/system-api-stubs
Checking API: checksystemapi-last
Checking API: checksystemapi-current
make: *** No rule to make target '/.txt', needed by '/out/target/common/obj/PACKAGING/checkpublicapi-cm-last-timestamp'. Stop.

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it's very vague, so I'm wondering if anyone could provide some insight.

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