don't know how to build these paths:
  /nix/store/6c4l1ha4xcb39lwqrd9njh3vhia70dda-docs.drv
warning: ignoring the client-specified setting 'store', because it is a restricted setting and you are not a trusted user
building '/nix/store/kdkfz3hd3yk6l5vj80xqr65aqp2smwsm-vhs.drv' on farm.numtide.com:50051
vhs> bld1: building kdkfz3hd3yk6l5vj80xqr65aqp2smwsm-vhs.drv
building '/nix/store/6c4l1ha4xcb39lwqrd9njh3vhia70dda-docs.drv' on farm.numtide.com:50051
docs> bld1: building 6c4l1ha4xcb39lwqrd9njh3vhia70dda-docs.drv
docs> Running phase: unpackPhase
docs> unpacking source archive /nix/store/qkwhd88cbyx67r9my22wyp1hkxc4ngql-source
docs> source root is source
docs> Running phase: patchPhase
docs> Running phase: updateAutotoolsGnuConfigScriptsPhase
docs> Running phase: configurePhase
docs> no configure script, doing nothing
docs> Running phase: buildPhase
docs> INFO    -  Cleaning site directory
docs> INFO    -  Building documentation to directory: /build/source/docs/out
docs> WARNING -  The following pages exist in the docs directory, but are not included in the "nav" configuration:
docs>   - index.md
docs> WARNING -  Doc file 'reference/stdin-spec.md' contains an absolute link '/reference/formatter-spec', it was left as is. Did you mean 'formatter-spec.md'?
docs> INFO    -  Documentation built in 0.65 seconds
docs> Running phase: installPhase
docs> Running phase: fixupPhase
docs> shrinking RPATHs of ELF executables and libraries in /nix/store/l2521j2a737smfck813vbhi2zvrz9zqg-docs
docs> checking for references to /build/ in /nix/store/l2521j2a737smfck813vbhi2zvrz9zqg-docs...
docs> patching script interpreter paths in /nix/store/l2521j2a737smfck813vbhi2zvrz9zqg-docs