Swift LIT test against a toolchain

Hi I want to run a particular LIT test against several different nightly toolchains.

The command I used to generate and run a LIT test case:

../llvm-project/llvm/utils/lit/lit.py -sv /Users/viranchee/appleSwift/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/AutoDiff/ --show-xfail --show-unsupported --filter differentiable_protocol_requirements.swift

This generates and runs a LIT build shell script which gets created at:

From that shell script, I was able to modify directories to a Nightly Toolchain: DYLD_LIBRARY_PATH, LIB_PATH, and the test runs fine

However, on replacing the build swiftc path to a toolchain's swiftc path, gives me error:

error: no such module 'StdlibUnittest'
error: no such module 'DifferentiationUnittest'

I have uploaded the LIT test script with modified path here: