this derivation will be built:
  /nix/store/ps53drnbfkp3c6g6l160pma80pv5qj4y-harmonia-clippy-3.2.0.drv
Failed to find a machine for remote build!
derivation: ps53drnbfkp3c6g6l160pma80pv5qj4y-harmonia-clippy-3.2.0.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/ps53drnbfkp3c6g6l160pma80pv5qj4y-harmonia-clippy-3.2.0.drv'.
       Reason: builder failed with exit code 101.
       Output paths:
         /nix/store/73saj99vwljp9cvzqrlymdq32mk5lm1c-harmonia-clippy-3.2.0
       Last 25 log lines:
       >     Checking harmonia-file-nar v3.2.0 (/build/source/harmonia-file-nar)
       >     Checking harmonia-store-path v3.2.0 (/build/source/harmonia-store-path)
       >     Checking harmonia-store-content-address v3.2.0 (/build/source/harmonia-store-content-address)
       >     Checking harmonia-store-ref-scan v0.0.0-alpha.0 (/build/source/harmonia-store-ref-scan)
       >     Checking harmonia-bench v3.2.0 (/build/source/harmonia-bench)
       >     Checking harmonia-store-derivation v0.0.0-alpha.0 (/build/source/harmonia-store-derivation)
       >     Checking harmonia-store-path-info v3.2.0 (/build/source/harmonia-store-path-info)
       >     Checking harmonia-store-nar-info v3.2.0 (/build/source/harmonia-store-nar-info)
       >     Checking harmonia-store-db v3.2.0 (/build/source/harmonia-store-db)
       >     Checking harmonia-store-aterm v0.0.0-alpha.0 (/build/source/harmonia-store-aterm)
       >     Checking harmonia-store-build-result v3.2.0 (/build/source/harmonia-store-build-result)
       >     Checking harmonia-protocol v3.2.0 (/build/source/harmonia-protocol)
       >     Checking harmonia-store-gc v3.2.0 (/build/source/harmonia-store-gc)
       >     Checking harmonia-cache v3.2.0 (/build/source/harmonia-cache)
       > error: unused variable: `idrv`
       >    --> harmonia-store-db/tests/graph.rs:183:16
       >     |
       > 183 |     let (iout, idrv) = (idx_of(&g, "-pkg"), idx_of(&g, ".drv"));
       >     |                ^^^^ help: if this is intentional, prefix it with an underscore: `_idrv`
       >     |
       >     = note: `-D unused-variables` implied by `-D warnings`
       >     = help: to override `-D warnings` add `#[allow(unused_variables)]`
       >
       > error: could not compile `harmonia-store-db` (test "graph") due to 1 previous error
       > warning: build failed, waiting for other jobs to finish...
       For full logs, run:
         nix log /nix/store/ps53drnbfkp3c6g6l160pma80pv5qj4y-harmonia-clippy-3.2.0.drv