$ /nix/store/rry6qingvsrqmc7ll7jgaqpybcbdgf5v-coreutils-9.7/bin/timeout --kill-after=15s 1800s /nix/store/mycbwkcm1jzjgsaiydvzib9phmzfz9vx-nix-2.31.1/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --extra-substituters https://cache.nix-ci.com --extra-trusted-public-keys nix-ci-staging:Q5+aawDG0LPCgu1fP9e+9hktvsfSyvu/Xe5PvzTLRVs= --netrc-file /tmp/nix-ci-worker-25d58c04c0efbd22/nix-ci-cache-dbc2aa1088ad50b3/netrc --extra-substituters ssh-ng://worker.nix-ci.com?ssh-key=/tmp/nix-ci-worker-25d58c04c0efbd22/ssh-key-cfa462e3674d8232/ssh.key&remote-store=/cache/nix-ci/&base64-ssh-public-host-key=c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSU9EQXdicHlRaVYwb2lyakhxbHIwbitnWDNNVjQwbDBKTmlKdVNDZHdoZ1o= --extra-trusted-public-keys nix-ci-staging:Q5+aawDG0LPCgu1fP9e+9hktvsfSyvu/Xe5PvzTLRVs= --allow-import-from-derivation --print-build-logs flake show git+https://x-access-token:<REDACTED:GITHUB_ACCESS_TOKEN>@github.com/sellout/kilns-haskell?ref=renovate%2Flock-file-maintenance&rev=a9db0d3fec87154ff07424d3c9fbe67d89d8f623 --json --system x86_64-linux --post-build-hook /tmp/nix-ci-worker-25d58c04c0efbd22/nix-ci-cache-upload.sh
evaluating ''...
error:
       … while evaluating the attribute 'root.result'
         at «flakes-internal»/call-flake.nix:94:7:
           93|     {
           94|       result =
             |       ^
           95|         if node.flake or true then

       … in the left operand of the update (//) operator
         at «flakes-internal»/call-flake.nix:81:9:
           80|         # This is shadowed in the next //
           81|         // sourceInfo
             |         ^
           82|         // {

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: attribute 'defaultSystems' missing
       at /nix/store/3zhn7a5nshsnv6zpj2374dnyzzzjd84q-source/flake.nix:41:24:
           40|
           41|     supportedSystems = flaky.lib.defaultSystems;
             |                        ^
           42|