this derivation will be built:
  /nix/store/c4q4krcnix9lphnv9hpk834zq3a5n8xr-flakelet-0.1.0.drv
Failed to find a machine for remote build!
derivation: c4q4krcnix9lphnv9hpk834zq3a5n8xr-flakelet-0.1.0.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])
error: Cannot build '/nix/store/c4q4krcnix9lphnv9hpk834zq3a5n8xr-flakelet-0.1.0.drv'.
       Reason: builder failed with exit code 101.
       Output paths:
         /nix/store/72waf2p5ysdgxp59gic6iwhp0rljll81-flakelet-0.1.0
       Last 25 log lines:
       >
       > error[E0600]: cannot apply unary operator `!` to type `std::option::Option<std::string::String>`
       >    --> flakelet-core/src/systemd.rs:458:17
       >     |
       > 458 |         assert!(!unix_listener(t, "/run/a/64.sock"));
       >     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot apply unary operator `!`
       >     |
       > note: `std::option::Option<std::string::String>` does not implement `Not`
       >    --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/option.rs:597:0
       >     |
       >     = note: `std::option::Option<std::string::String>` is defined in another crate
       >
       > error[E0600]: cannot apply unary operator `!` to type `std::option::Option<std::string::String>`
       >    --> flakelet-core/src/systemd.rs:459:17
       >     |
       > 459 |         assert!(!unix_listener(t, "/run/a/65.sock"));
       >     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot apply unary operator `!`
       >     |
       > note: `std::option::Option<std::string::String>` does not implement `Not`
       >    --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/option.rs:597:0
       >     |
       >     = note: `std::option::Option<std::string::String>` is defined in another crate
       >
       > For more information about this error, try `rustc --explain E0600`.
       > error: could not compile `flakelet-core` (lib test) due to 3 previous errors
       For full logs, run:
         nix log /nix/store/c4q4krcnix9lphnv9hpk834zq3a5n8xr-flakelet-0.1.0.drv