this derivation will be built:
  /nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv
waiting for the big Nix store lock...
waiting for exclusive access to the Nix store...
building '/nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv' on 'ssh-ng://nix@eliza'
building '/nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv'
flaky-5> flaky failure
error: build of '/nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv' on 'ssh-ng://nix@eliza' failed: Cannot build '/nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rly4cq6wb64gavv6k65ynbr2msrjcwdc-flaky-5
       Last 1 log lines:
       > flaky failure
       For full logs, run:
         nix log /nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv
error: Cannot build '/nix/store/kkbzvj5kcnnzd3ykbwvwyxj94a1jx8k2-flaky-5.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rly4cq6wb64gavv6k65ynbr2msrjcwdc-flaky-5