+> target=/nix/store/7w0p1n9j4v7rj8bbcykd0mm2x9zca8jg-libc.a-builder 
 +> mkdir -p /nix/store/7w0p1n9j4v7rj8bbcykd0mm2x9zca8jg-libc.a-builder. 
 +> cp /build/.attr-1lf969yddshzhld7sr1vbagr07bnygg99lgl6gk5kxcnp4z9wbcq /nix/store/7w0p1n9j4v7rj8bbcykd0mm2x9zca8jg-libc.a-builder