Compiling llvm-sys v160.1.4
Compiling inkwell v0.4.0 (https://github.com/TheDan64/inkwell?branch=master#5d5a531c)
error: could not find native static library Polly, perhaps an -L flag is missing?

error: could not compile llvm-sys (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...