fix: cross bug

Author: SyMind

rspack/crates/binding/Cargo.toml

@@ -35,3 +35,12 @@ rspack_binding_builder = { version = "=0.5.4", features = ["plugin"] }
 [build-dependencies]
 rspack_binding_build = { version = "=0.5.4" }
 
+# Workaround for `cross` builds to resolve parent workspace dependencies.
+# When cross-compiling, the build runs in an isolated container and can't find
+# the root workspace (`../../../`), causing a "failed to find a workspace root"
+# error for path dependencies like `next-taskless`.
+# This mounts the parent directory into the container, making the root `Cargo.toml` visible.
+# See: https://github.com/cross-rs/cross/issues/1181
+[package.metadata.cross.build.env]
+volumes = ["__LIB12_DEP=../../.."]
+