diff --git a/packer/README.md b/packer/README.md
index e9e6215..74dd48c 100644
--- a/packer/README.md
+++ b/packer/README.md
@@ -56,3 +56,4 @@ description = "a brown fox jumps over a lazy dog."
 ## Environment Variables
 
 - `OMRF_PACKER_CARGO`: Path to the `cargo` executable used to collect project metadata. When unset, the packer invokes `cargo` as resolved from `PATH`.
+- `OMRF_PACKER_RUSTC`: Path to the `rustc` executable used to resolve the host toolchain triple. When unset, the packer invokes `rustc` as resolved from `PATH`.
diff --git a/packer/src/sarasacw_omrf_packer/artifact.py b/packer/src/sarasacw_omrf_packer/artifact.py
index 6b76187..1c89a6a 100644
--- a/packer/src/sarasacw_omrf_packer/artifact.py
+++ b/packer/src/sarasacw_omrf_packer/artifact.py
@@ -165,7 +165,6 @@ def _generate_lib_artifact_name(name: str, _: Triple) -> str:
 def resolve_lib_copy(ctx: ArtifactContext) -> Iterator[FileCopyInfo]:
     """Yield :class:`FileCopyInfo` for the built dynamic library (and, on Windows, the import library)."""
     extractor = ctx.extractor
-    target_directory = extractor.get_target_directory() / "release"
     target_name = extractor.get_target_name()
 
     # get triple info
@@ -173,6 +172,12 @@ def resolve_lib_copy(ctx: ArtifactContext) -> Iterator[FileCopyInfo]:
     if ctx.options.target is not None:
         target_triple = ctx.options.target
 
+    # compute target directory
+    target_directory = extractor.get_target_directory()
+    if ctx.options.target is not None:
+        target_directory /= str(ctx.options.target)
+    target_directory /= "release"
+
     # copy artifact for redist
     dll_artifact_filename = _generate_dll_artifact_name(target_name, target_triple)
     yield FileCopyInfo(