this derivation will be built:
  /nix/store/k1zwfcxsw7iqsc5kl5bagd17c2yxy9by-harmonia-llvm-cov-3.2.0.drv
error: build of '/nix/store/k1zwfcxsw7iqsc5kl5bagd17c2yxy9by-harmonia-llvm-cov-3.2.0.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/k1zwfcxsw7iqsc5kl5bagd17c2yxy9by-harmonia-llvm-cov-3.2.0.drv'.
       Reason: builder failed with exit code 101.
       Output paths:
         /nix/store/l8lb84cwyrc3gby0r8fwrj0550ayy7zl-harmonia-llvm-cov-3.2.0
       Last 25 log lines:
       >    Compiling harmonia-ssh-store v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-ssh-store)
       >    Compiling harmonia-client v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-client)
       >    Compiling harmonia-utils-hash v0.0.0-alpha.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-utils-hash)
       >    Compiling harmonia-utils-signature v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-utils-signature)
       >    Compiling harmonia-file-nar v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-file-nar)
       >    Compiling harmonia-store-path v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-path)
       >    Compiling harmonia-store-content-address v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-content-address)
       >    Compiling harmonia-store-fs v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-fs)
       >    Compiling harmonia-store-ref-scan v0.0.0-alpha.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-ref-scan)
       >    Compiling harmonia-store-derivation v0.0.0-alpha.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-derivation)
       >    Compiling harmonia-store-path-info v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-path-info)
       >    Compiling harmonia-store-nar-info v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-nar-info)
       >    Compiling harmonia-store-aterm v0.0.0-alpha.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-aterm)
       >    Compiling harmonia-store-build-result v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-build-result)
       >    Compiling harmonia-store-db v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-db)
       >    Compiling harmonia-protocol v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-protocol)
       >    Compiling harmonia-store-gc v3.2.0 (/nix/var/nix/builds/nix-18394-1365157894/source/harmonia-store-gc)
       > error: cannot find macro `debug` in this scope
       >    --> harmonia-store-gc/src/roots.rs:205:9
       >     |
       > 205 |         debug!("removing stale link {}", link.display());
       >     |         ^^^^^
       >
       > error: could not compile `harmonia-store-gc` (lib) due to 1 previous error
       > warning: build failed, waiting for other jobs to finish...
       For full logs, run:
         nix log /nix/store/k1zwfcxsw7iqsc5kl5bagd17c2yxy9by-harmonia-llvm-cov-3.2.0.drv
error: Cannot build '/nix/store/k1zwfcxsw7iqsc5kl5bagd17c2yxy9by-harmonia-llvm-cov-3.2.0.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/l8lb84cwyrc3gby0r8fwrj0550ayy7zl-harmonia-llvm-cov-3.2.0