let out_dir = builder.cargo_out(compiler, Mode::Codegen, target);
- let mut cargo =
- builder.cargo(compiler, Mode::Codegen, SourceType::Submodule, target, "build");
+ let mut cargo = builder.cargo(compiler, Mode::Codegen, SourceType::InTree, target, "build");
cargo
.arg("--manifest-path")
.arg(builder.src.join(format!("compiler/rustc_codegen_{}/Cargo.toml", backend)));