these 4 derivations will be built:
  /nix/store/6cap7s0hlan2x4a5glgm2a6iyd37r3vg-Cargo.toml.drv
  /nix/store/7m43v9p0c2xsyb583a2ybh1s1g07is2q-source.drv
  /nix/store/g2rs7hwmvqhniaz43ilgmmxznlqghxj3-iets-deps-static-aarch64-unknown-linux-musl-0.1.0.drv
  /nix/store/cswry3srjb4lhbrnfyi9ipm376x965kh-iets-static-aarch64-unknown-linux-musl-0.1.0.drv