export BUILD_DIR=/mnt/c/Users/path-to-llvm
cmake .. -DMLIR_DIR=$BUILD_DIR/lib/cmake/mlir \
-DLLVM_EXTERNAL_LIT=$BUILD_DIR/bin/llvm-lit \
cmake --build .
$BUILD_DIR/bin/mlir-tblgen -gen-op-defs ../include/lambdapure/Ops.td -I $BUILD_DIR/../mlir/include/
set_option trace.compiler.lambda_pure true
set_option trace.compiler.ir.init true