unable to install SnarkOS

[ChaosCtrlGames]

i have been trying to install SnarkOS for a bit now & get this every time:

error: failed to run custom build command for librocksdb-sys v0.11.0+8.1.1

Caused by:
process didn't exit successfully: C:\Users\andys\snarkOS\target\release\build\librocksdb-sys-ecde36df7a25c5b2\build-script-build (exit code: 101)
--- stderr
thread 'main' panicked at C:\Users\andys.cargo\registry\src\index.crates.io-6f17d22bba15001f\bindgen-0.65.1\lib.rs:603:31:
Unable to find libclang: "couldn't find any valid shared libraries matching: ['clang.dll', 'libclang.dll'], set the LIBCLANG_PATH environment variable to a path where one of these files can be found (invalid: [])"
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: failed to compile snarkos v3.2.0 (C:\Users\andys\snarkOS), intermediate artifacts can be found at C:\Users\andys\snarkOS\target.
To reuse those artifacts with a future compilation, set the environment variable CARGO_TARGET_DIR to that path.

I did update rust & leo was downloaded prior as instructed. not sure what i need to do to fix this