+> target=/nix/store/40szqjzsxv1qv3xaqnwxdkrq8mgfcnzf-mes-0.27.1-builder 
 +> mkdir -p /nix/store/40szqjzsxv1qv3xaqnwxdkrq8mgfcnzf-mes-0.27.1-builder. 
 +> cp /build/.attr-1lf969yddshzhld7sr1vbagr07bnygg99lgl6gk5kxcnp4z9wbcq /nix/store/40szqjzsxv1qv3xaqnwxdkrq8mgfcnzf-mes-0.27.1-builder