Otherwise we end up with cache collisions like this in CI :
```
> Error: cannot open '/tmp/nim/libsds_d/@z..@f..@f..@f..@f..@f..
@ffgber@f6y2zz1uv2lzi4ln2717py8m0aix64u56-avz-hajenccrq-2.2.4@favz
@fyvo@fflfgrz@frkprcgvbaf.nim.c'
```
Otherwise it fails with:
error: aarch64-darwin not supported for Android SDK. Use: NIXPKGS_SYSTEM_OVERRIDE=x86_64-darwin
Signed-off-by: Jakub Sokołowski <jakub@status.im>
For some unknown reason the builds would fail with:
/bin/sh: line 1: clang: command not found
Unless we added Android NDK toolchains/llvm/prebuilt to PATH.
Signed-off-by: Jakub Sokołowski <jakub@status.im>