this derivation will be built:
  /nix/store/vkq5q8jd6bqgwq2jb8hscs9snj0mi49w-rust-toolchain-with-succinct.drv
these 3 paths will be fetched (611.9 MiB download, 1.5 GiB unpacked):
  /nix/store/sk4gmfhjsff4f538rh3b256qa467izv3-rust-toolchain-x86_64-unknown-linux-gnu.tar.gz
  /nix/store/7nkfm1g9yndn4rqdg0alxfnn0b77dilh-rustc
  /nix/store/lk8q85xdfsp0dvl83g7vmsib654qk0v5-succinct-rust-succinct-1.93.0-64bit
rust-toolchain-with-succinct> /nix/store/0xjd3nsmh0ffrwl54bagfrx9kzx1cwic-rustc-wrapper-1.94.0/bin:
rust-toolchain-with-succinct> rustc: Keeping existing link to /nix/store/7nkfm1g9yndn4rqdg0alxfnn0b77dilh-rustc/bin/rustc