diff --git a/tools/osbuilder/rootfs-builder/rootfs.sh b/tools/osbuilder/rootfs-builder/rootfs.sh
index 20c14b2e8..b13dc3cbc 100755
--- a/tools/osbuilder/rootfs-builder/rootfs.sh
+++ b/tools/osbuilder/rootfs-builder/rootfs.sh
@@ -554,6 +554,7 @@ EOT
 			echo "WARNING: Forcing LIBC=gnu because $ARCH has no musl Rust target"
 		fi
 		[ "$LIBC" == "musl" ] && bash ${script_dir}/../../../ci/install_musl.sh
+		test -r "${HOME}/.cargo/env" && source "${HOME}/.cargo/env"
 		# rust agent needs ${arch}-unknown-linux-${LIBC}
 		if ! (rustup show | grep -v linux-${LIBC} > /dev/null); then
 			if [ "$RUST_VERSION" == "null" ]; then