andy@ark ~> ldd (which env)
	linux-vdso.so.1 (0x00007ffec87fe000)
	librt.so.1 => /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib/librt.so.1 (0x00007f77c3fc0000)
	libacl.so.1 => /nix/store/n8zknaf1wkanpd9032f5j00qmx5ah36j-acl-2.2.53/lib/libacl.so.1 (0x00007f77c3fb5000)
	libattr.so.1 => /nix/store/9izak3g69kj6qqv4fixj6b40qr9yg22p-attr-2.4.48/lib/libattr.so.1 (0x00007f77c3fad000)
	libcrypto.so.1.1 => /nix/store/d53c2kq9757p08j56m46m11lpj1zinnj-openssl-1.1.1d/lib/libcrypto.so.1.1 (0x00007f77c3cc7000)
	libpthread.so.0 => /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib/libpthread.so.0 (0x00007f77c3ca6000)
	libc.so.6 => /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib/libc.so.6 (0x00007f77c3aee000)
	libdl.so.2 => /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib/libdl.so.2 (0x00007f77c3ae9000)
	/nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib/ld-linux-x86-64.so.2 => /nix/store/aag9d1y4wcddzzrpfmfp9lcmc7skd7jk-glibc-2.27/lib64/ld-linux-x86-64.so.2 (0x00007f77c3fcc000)